Removed versionadded/changed annotations for 3.1.

28 files changed, 0 insertions, 284 deletions

diff --git a/docs/ref/checks.txt b/docs/ref/checks.txt
index b07a81f413..48ffb8c816 100644
--- a/docs/ref/checks.txt
+++ b/docs/ref/checks.txt
@@ -93,15 +93,6 @@ Django's system checks are organized using the following tags:
 
 Some checks may be registered with multiple tags.
 
-.. versionchanged:: 3.1
-
-    The ``async_support`` tag was added.
-
-.. versionchanged:: 3.1
-
-    The ``database`` checks are now run only for database aliases specified
-    using the :option:`check --database` option.
-
 .. versionchanged:: 3.2
 
     The ``sites`` tag was added.
@@ -112,8 +103,6 @@ Core system checks
 Asynchronous support
 --------------------
 
-.. versionadded:: 3.1
-
 The following checks verify your setup for :doc:`/topics/async`:
 
 * **async.E001**: You should not set the :envvar:`DJANGO_ALLOW_ASYNC_UNSAFE`
diff --git a/docs/ref/contrib/admin/index.txt b/docs/ref/contrib/admin/index.txt
index c6135ca5cb..0a42199c34 100644
--- a/docs/ref/contrib/admin/index.txt
+++ b/docs/ref/contrib/admin/index.txt
@@ -40,12 +40,6 @@ If you're not using the default project template, here are the requirements:
    the ``'context_processors'`` option of :setting:`OPTIONS
    <TEMPLATES-OPTIONS>`.
 
-   .. versionchanged:: 3.1
-
-       ``django.template.context_processors.request`` was added as a
-       requirement in the ``'context_processors'`` option to support the new
-       :attr:`.AdminSite.enable_nav_sidebar`.
-
 #. If you've customized the :setting:`MIDDLEWARE` setting,
    :class:`django.contrib.auth.middleware.AuthenticationMiddleware` and
    :class:`django.contrib.messages.middleware.MessageMiddleware` must be
@@ -1042,10 +1036,6 @@ subclass::
         The :class:`~django.contrib.contenttypes.fields.GenericForeignKey`
         field is not supported.
 
-      .. versionadded:: 3.1
-
-          The ``EmptyFieldListFilter`` class was added.
-
     List filter's typically appear only if the filter has more than one choice.
     A filter's ``has_output()`` method controls whether or not it appears.
 
@@ -2230,10 +2220,6 @@ To avoid conflicts with user-supplied scripts or libraries, Django's jQuery
 in your own admin JavaScript without including a second copy, you can use the
 ``django.jQuery`` object on changelist and add/edit views.
 
-.. versionchanged:: 3.1
-
-    jQuery was upgraded from 3.4.1 to 3.5.1.
-
 The :class:`ModelAdmin` class requires jQuery by default, so there is no need
 to add jQuery to your ``ModelAdmin``’s list of media resources unless you have
 a specific need. For example, if you require the jQuery library to be in the
@@ -2953,8 +2939,6 @@ Templates can override or extend base admin templates as described in
 
 .. attribute:: AdminSite.enable_nav_sidebar
 
-    .. versionadded:: 3.1
-
     A boolean value that determines whether to show the navigation sidebar
     on larger screens. By default, it is set to ``True``.
 
diff --git a/docs/ref/contrib/auth.txt b/docs/ref/contrib/auth.txt
index de2a2321ba..6bcdf5e099 100644
--- a/docs/ref/contrib/auth.txt
+++ b/docs/ref/contrib/auth.txt
@@ -40,10 +40,6 @@ Fields
         Optional (:attr:`blank=True <django.db.models.Field.blank>`). 150
         characters or fewer.
 
-        .. versionchanged:: 3.1
-
-            The ``max_length`` increased from 30 to 150 characters.
-
     .. attribute:: last_name
 
         Optional (:attr:`blank=True <django.db.models.Field.blank>`). 150
diff --git a/docs/ref/contrib/gis/functions.txt b/docs/ref/contrib/gis/functions.txt
index 351429b49e..9f7043c2b0 100644
--- a/docs/ref/contrib/gis/functions.txt
+++ b/docs/ref/contrib/gis/functions.txt
@@ -83,10 +83,6 @@ Keyword Argument       Description
                        Oracle.
 =====================  =====================================================
 
-.. versionchanged:: 3.1
-
-    Oracle support was added.
-
 ``AsGML``
 =========
 
@@ -144,10 +140,6 @@ Keyword Argument       Description
 
 __ https://developers.google.com/kml/documentation/
 
-.. versionchanged:: 3.1
-
-    The undocumented ``version`` parameter was removed.
-
 ``AsSVG``
 =========
 
@@ -177,8 +169,6 @@ __ https://www.w3.org/Graphics/SVG/
 
 .. class:: AsWKB(expression, **extra)
 
-.. versionadded:: 3.1
-
 *Availability*: MariaDB, `MySQL
 <https://dev.mysql.com/doc/refman/en/gis-format-conversion-functions.html#function_st-asbinary>`__,
 Oracle, `PostGIS <https://postgis.net/docs/ST_AsBinary.html>`__, SpatiaLite
@@ -198,8 +188,6 @@ __ https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry#Well
 
 .. class:: AsWKT(expression, **extra)
 
-.. versionadded:: 3.1
-
 *Availability*: MariaDB, `MySQL
 <https://dev.mysql.com/doc/refman/en/gis-format-conversion-functions.html#function_st-astext>`__,
 Oracle, `PostGIS <https://postgis.net/docs/ST_AsText.html>`__, SpatiaLite
diff --git a/docs/ref/contrib/gis/geoquerysets.txt b/docs/ref/contrib/gis/geoquerysets.txt
index dfda2fa3b7..9a8bb3f29f 100644
--- a/docs/ref/contrib/gis/geoquerysets.txt
+++ b/docs/ref/contrib/gis/geoquerysets.txt
@@ -439,10 +439,6 @@ PostGIS SQL equivalent:
     SELECT ... WHERE ST_Relate(poly, ST_Polygon(rast, 1), 'T*T***FF*')
     SELECT ... WHERE ST_Relate(ST_Polygon(rast, 2), ST_Polygon(rast, 1), 'T*T***FF*')
 
-.. versionchanged:: 3.1
-
-    MariaDB support was added.
-
 Oracle
 ~~~~~~
 
diff --git a/docs/ref/contrib/gis/geos.txt b/docs/ref/contrib/gis/geos.txt
index 446fb38108..e2713439fc 100644
--- a/docs/ref/contrib/gis/geos.txt
+++ b/docs/ref/contrib/gis/geos.txt
@@ -729,8 +729,6 @@ Other Properties & Methods
 
     .. attribute:: is_counterclockwise
 
-        .. versionadded:: 3.1
-
         Returns whether this ``LinearRing`` is counterclockwise.
 
 ``Polygon``
diff --git a/docs/ref/contrib/humanize.txt b/docs/ref/contrib/humanize.txt
index 00718582f5..7c1af53ed3 100644
--- a/docs/ref/contrib/humanize.txt
+++ b/docs/ref/contrib/humanize.txt
@@ -78,10 +78,6 @@ e.g. with the ``'de'`` language:
 * ``1200000000`` becomes ``'1,2 Milliarden'``.
 * ``-1200000000`` becomes ``'-1,2 Milliarden'``.
 
-.. versionchanged:: 3.1
-
-    Support for negative integers was added.
-
 .. templatefilter:: naturalday
 
 ``naturalday``
diff --git a/docs/ref/contrib/postgres/constraints.txt b/docs/ref/contrib/postgres/constraints.txt
index 25e6ae5ae0..7907eaefdf 100644
--- a/docs/ref/contrib/postgres/constraints.txt
+++ b/docs/ref/contrib/postgres/constraints.txt
@@ -79,8 +79,6 @@ These conditions have the same database restrictions as
 
 .. attribute:: ExclusionConstraint.deferrable
 
-.. versionadded:: 3.1
-
 Set this parameter to create a deferrable exclusion constraint. Accepted values
 are ``Deferrable.DEFERRED`` or ``Deferrable.IMMEDIATE``. For example::
 
diff --git a/docs/ref/contrib/postgres/fields.txt b/docs/ref/contrib/postgres/fields.txt
index df9ebc48d6..eee99592b3 100644
--- a/docs/ref/contrib/postgres/fields.txt
+++ b/docs/ref/contrib/postgres/fields.txt
@@ -686,14 +686,6 @@ The ``contained_by`` lookup is also available on the non-range field types:
     ... )
     <QuerySet [<Event: Soft play>]>
 
-.. versionchanged:: 3.1
-
-    Support for :class:`~django.db.models.SmallAutoField`,
-    :class:`~django.db.models.AutoField`,
-    :class:`~django.db.models.BigAutoField`,
-    :class:`~django.db.models.SmallIntegerField`, and
-    :class:`~django.db.models.DecimalField` was added.
-
 .. fieldlookup:: rangefield.overlap
 
 ``overlap``
@@ -813,8 +805,6 @@ Returned objects are empty ranges. Can be chained to valid lookups for a
 ``lower_inc``
 ^^^^^^^^^^^^^
 
-.. versionadded:: 3.1
-
 Returns objects that have inclusive or exclusive lower bounds, depending on the
 boolean value passed. Can be chained to valid lookups for a
 :class:`~django.db.models.BooleanField`.
@@ -827,8 +817,6 @@ boolean value passed. Can be chained to valid lookups for a
 ``lower_inf``
 ^^^^^^^^^^^^^
 
-.. versionadded:: 3.1
-
 Returns objects that have unbounded (infinite) or bounded lower bound,
 depending on the boolean value passed. Can be chained to valid lookups for a
 :class:`~django.db.models.BooleanField`.
@@ -841,8 +829,6 @@ depending on the boolean value passed. Can be chained to valid lookups for a
 ``upper_inc``
 ^^^^^^^^^^^^^
 
-.. versionadded:: 3.1
-
 Returns objects that have inclusive or exclusive upper bounds, depending on the
 boolean value passed. Can be chained to valid lookups for a
 :class:`~django.db.models.BooleanField`.
@@ -855,8 +841,6 @@ boolean value passed. Can be chained to valid lookups for a
 ``upper_inf``
 ^^^^^^^^^^^^^
 
-.. versionadded:: 3.1
-
 Returns objects that have unbounded (infinite) or bounded upper bound,
 depending on the boolean value passed. Can be chained to valid lookups for a
 :class:`~django.db.models.BooleanField`.
diff --git a/docs/ref/contrib/postgres/indexes.txt b/docs/ref/contrib/postgres/indexes.txt
index 4a9b2ad22e..746e26330e 100644
--- a/docs/ref/contrib/postgres/indexes.txt
+++ b/docs/ref/contrib/postgres/indexes.txt
@@ -12,8 +12,6 @@ available from the ``django.contrib.postgres.indexes`` module.
 
 .. class:: BloomIndex(*expressions, length=None, columns=(), **options)
 
-    .. versionadded:: 3.1
-
     Creates a bloom_ index.
 
     To use this index access you need to activate the bloom_ extension on
diff --git a/docs/ref/contrib/postgres/operations.txt b/docs/ref/contrib/postgres/operations.txt
index ff37728d27..8491ac2f52 100644
--- a/docs/ref/contrib/postgres/operations.txt
+++ b/docs/ref/contrib/postgres/operations.txt
@@ -61,8 +61,6 @@ them. In that case, connect to your Django database and run the query
 
 .. class:: BloomExtension()
 
-    .. versionadded:: 3.1
-
     Installs the ``bloom`` extension.
 
 ``BtreeGinExtension``
diff --git a/docs/ref/contrib/postgres/search.txt b/docs/ref/contrib/postgres/search.txt
index f00bddbee4..fe4e86f05e 100644
--- a/docs/ref/contrib/postgres/search.txt
+++ b/docs/ref/contrib/postgres/search.txt
@@ -35,10 +35,6 @@ query and the vector.
 To use the ``search`` lookup, ``'django.contrib.postgres'`` must be in your
 :setting:`INSTALLED_APPS`.
 
-.. versionchanged:: 3.1
-
-    Support for query expressions was added.
-
 ``SearchVector``
 ================
 
@@ -110,11 +106,6 @@ Examples:
 See :ref:`postgresql-fts-search-configuration` for an explanation of the
 ``config`` parameter.
 
-.. versionchanged:: 3.1
-
-    Support for ``'websearch'`` search type and query expressions in
-    ``SearchQuery.value`` were added.
-
 ``SearchRank``
 ==============
 
@@ -159,15 +150,9 @@ normalization options`_.
 
 .. _different rank normalization options: https://www.postgresql.org/docs/current/textsearch-controls.html#TEXTSEARCH-RANKING
 
-.. versionadded:: 3.1
-
-    The ``normalization`` and ``cover_density`` parameters were added.
-
 ``SearchHeadline``
 ==================
 
-.. versionadded:: 3.1
-
 .. class:: SearchHeadline(expression, query, config=None, start_sel=None, stop_sel=None, max_words=None, min_words=None, short_word=None, highlight_all=None, max_fragments=None, fragment_delimiter=None)
 
 Accepts a single text field or an expression, a query, a config, and a set of
diff --git a/docs/ref/django-admin.txt b/docs/ref/django-admin.txt
index c916ff96c8..b7f6e175be 100644
--- a/docs/ref/django-admin.txt
+++ b/docs/ref/django-admin.txt
@@ -106,8 +106,6 @@ For example, to perform only models and compatibility checks, run::
 
 .. django-admin-option:: --database DATABASE
 
-.. versionadded:: 3.1
-
 Specifies the database to run checks requiring database access::
 
     django-admin check --database default --database other
@@ -226,8 +224,6 @@ Specifies the database onto which to open a shell. Defaults to ``default``.
 
 .. django-admin-option:: -- ARGUMENTS
 
-.. versionadded:: 3.1
-
 Any arguments following a ``--`` divider will be passed on to the underlying
 command-line client. For example, with PostgreSQL you can use the ``psql``
 command's ``-c`` flag to execute a raw SQL query directly:
@@ -914,8 +910,6 @@ content types.
 
 .. django-admin-option:: --check
 
-.. versionadded:: 3.1
-
 Makes ``migrate`` exit with a non-zero status when unapplied migrations are
 detected.
 
@@ -1519,8 +1513,6 @@ installed, ``ipdb`` is used instead.
 
 .. django-admin-option:: --buffer, -b
 
-.. versionadded:: 3.1
-
 Discards output (``stdout`` and ``stderr``) for passing tests, in the same way
 as :option:`unittest's --buffer option<unittest.-b>`.
 
@@ -1709,8 +1701,6 @@ Specifies the database to use. Defaults to ``default``.
 
 .. django-admin-option:: --include-stale-apps
 
-.. versionadded:: 3.1
-
 Deletes stale content types including ones from previously installed apps that
 have been removed from :setting:`INSTALLED_APPS`. Defaults to ``False``.
 
diff --git a/docs/ref/files/storage.txt b/docs/ref/files/storage.txt
index bd595f36b9..8cae580767 100644
--- a/docs/ref/files/storage.txt
+++ b/docs/ref/files/storage.txt
@@ -69,11 +69,6 @@ The ``FileSystemStorage`` class
         time of the last metadata change, and on others (like Windows), it's
         the creation time of the file.
 
-.. versionchanged:: 3.1
-
-    Support for :class:`pathlib.Path` was added to the
-    ``FileSystemStorage.save()`` method.
-
 The ``Storage`` class
 =====================
 
diff --git a/docs/ref/forms/api.txt b/docs/ref/forms/api.txt
index 8bf8f3c9c1..5df969232a 100644
--- a/docs/ref/forms/api.txt
+++ b/docs/ref/forms/api.txt
@@ -974,8 +974,6 @@ Attributes of ``BoundField``
 
 .. attribute:: BoundField.widget_type
 
-    .. versionadded:: 3.1
-
     Returns the lowercased class name of the wrapped field's widget, with any
     trailing ``input`` or ``widget`` removed. This may be used when building
     forms where the layout is dependent upon the widget type. For example::
diff --git a/docs/ref/forms/fields.txt b/docs/ref/forms/fields.txt
index 9438214a28..52ab59e626 100644
--- a/docs/ref/forms/fields.txt
+++ b/docs/ref/forms/fields.txt
@@ -514,14 +514,6 @@ For each field, we describe the default widget used if you don't specify
     ``DATE_INPUT_FORMATS`` keys if localization is enabled. See also
     :doc:`format localization </topics/i18n/formatting>`.
 
-    .. versionchanged:: 3.1
-
-        Support for ISO 8601 date string parsing (including optional timezone)
-        was added.
-
-        The fallback on ``DATE_INPUT_FORMATS`` in the default ``input_formats``
-        was added.
-
 ``DecimalField``
 ----------------
 
@@ -782,8 +774,6 @@ For each field, we describe the default widget used if you don't specify
 
 .. class:: JSONField(encoder=None, decoder=None, **kwargs)
 
-    .. versionadded:: 3.1
-
     A field which accepts JSON encoded data for a
     :class:`~django.db.models.JSONField`.
 
@@ -1450,21 +1440,11 @@ customize the yielded 2-tuple choices.
         :attr:`ChoiceField.choices`. The first ``value`` element is a
         :class:`ModelChoiceIteratorValue` instance.
 
-        .. versionchanged:: 3.1
-
-            In older versions, the first ``value`` element in the choice tuple
-            is the ``field`` value itself, rather than a
-            ``ModelChoiceIteratorValue`` instance. In most cases this proxies
-            transparently but, if you need the ``field`` value itself, use the
-            :attr:`ModelChoiceIteratorValue.value` attribute instead.
-
 ``ModelChoiceIteratorValue``
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. class:: ModelChoiceIteratorValue(value, instance)
 
-    .. versionadded:: 3.1
-
     Two arguments are required:
 
     .. attribute:: value
diff --git a/docs/ref/forms/widgets.txt b/docs/ref/forms/widgets.txt
index 9a19ab1436..dbcc9175d0 100644
--- a/docs/ref/forms/widgets.txt
+++ b/docs/ref/forms/widgets.txt
@@ -336,11 +336,6 @@ foundation for custom widgets.
         a hidden ``textarea`` element may want to always return ``False`` to
         avoid browser validation on the hidden field.
 
-        .. versionchanged:: 3.1
-
-            In older versions, ``True`` was returned for
-            :class:`~django.forms.FileInput` when ``initial`` was set.
-
 ``MultiWidget``
 ---------------
 
@@ -372,10 +367,6 @@ foundation for custom widgets.
             >>> widget.render('name', ['john', 'paul'])
             '<input type="text" name="name" value="john"><input type="text" name="name_last" value="paul">'
 
-        .. versionchanged::3.1
-
-            Support for using a dictionary was added.
-
     And one required method:
 
     .. method:: decompress(value)
diff --git a/docs/ref/models/constraints.txt b/docs/ref/models/constraints.txt
index 1536a8692a..e3b682d1c5 100644
--- a/docs/ref/models/constraints.txt
+++ b/docs/ref/models/constraints.txt
@@ -58,10 +58,6 @@ specifies the check you want the constraint to enforce.
 For example, ``CheckConstraint(check=Q(age__gte=18), name='age_gte_18')``
 ensures the age field is never less than 18.
 
-.. versionchanged:: 3.1
-
-    Support for boolean :class:`~django.db.models.Expression` was added.
-
 ``name``
 --------
 
@@ -119,8 +115,6 @@ These conditions have the same database restrictions as
 
 .. attribute:: UniqueConstraint.deferrable
 
-.. versionadded:: 3.1
-
 Set this parameter to create a deferrable unique constraint. Accepted values
 are ``Deferrable.DEFERRED`` or ``Deferrable.IMMEDIATE``. For example::
 
diff --git a/docs/ref/models/database-functions.txt b/docs/ref/models/database-functions.txt
index 948ce4e3cc..b63b4cff4a 100644
--- a/docs/ref/models/database-functions.txt
+++ b/docs/ref/models/database-functions.txt
@@ -336,8 +336,6 @@ Usage example::
 
 .. class:: ExtractIsoWeekDay(expression, tzinfo=None, **extra)
 
-    .. versionadded:: 3.1
-
     Returns the ISO-8601 week day with day 1 being Monday and day 7 being
     Sunday.
 
diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index a315402347..3409d2d023 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -842,10 +842,6 @@ Has two optional arguments:
     handles the storage and retrieval of your files. See :doc:`/topics/files`
     for details on how to provide this object.
 
-    .. versionchanged:: 3.1
-
-        The ability to provide a callable was added.
-
 The default form widget for this field is a
 :class:`~django.forms.ClearableFileInput`.
 
@@ -1198,8 +1194,6 @@ values are stored as null.
 
 .. class:: JSONField(encoder=None, decoder=None, **options)
 
-.. versionadded:: 3.1
-
 A field for storing JSON encoded data. In Python the data is represented in its
 Python native format: dictionaries, lists, strings, numbers, booleans and
 ``None``.
@@ -1276,8 +1270,6 @@ Like :class:`BooleanField` with ``null=True``.
 
 .. class:: PositiveBigIntegerField(**options)
 
-.. versionadded:: 3.1
-
 Like a :class:`PositiveIntegerField`, but only allows values under a certain
 (database-dependent) point. Values from ``0`` to ``9223372036854775807`` are
 safe in all databases supported by Django.
@@ -1579,8 +1571,6 @@ The possible values for :attr:`~ForeignKey.on_delete` are found in
 
 * .. attribute:: RESTRICT
 
-    .. versionadded:: 3.1
-
     Prevent deletion of the referenced object by raising
     :exc:`~django.db.models.RestrictedError` (a subclass of
     :exc:`django.db.IntegrityError`). Unlike :attr:`PROTECT`, deletion of the
diff --git a/docs/ref/models/instances.txt b/docs/ref/models/instances.txt
index 4222979972..7586159061 100644
--- a/docs/ref/models/instances.txt
+++ b/docs/ref/models/instances.txt
@@ -803,11 +803,6 @@ For example::
     >>> p.get_shirt_size_display()
     'Large'
 
-.. versionchanged:: 3.1
-
-    Support for :class:`~django.contrib.postgres.fields.ArrayField` and
-    :class:`~django.contrib.postgres.fields.RangeField` was added.
-
 .. method:: Model.get_next_by_FOO(**kwargs)
 .. method:: Model.get_previous_by_FOO(**kwargs)
 
diff --git a/docs/ref/models/querysets.txt b/docs/ref/models/querysets.txt
index 656bf537ad..eca0caf6d6 100644
--- a/docs/ref/models/querysets.txt
+++ b/docs/ref/models/querysets.txt
@@ -834,10 +834,6 @@ object. If it's ``None``, Django uses the :ref:`current time zone
 ambiguous datetimes in daylight saving time. By default (when ``is_dst=None``),
 ``pytz`` raises an exception for such datetimes.
 
-.. versionadded:: 3.1
-
-    The ``is_dst`` parameter was added.
-
 .. _database-time-zone-definitions:
 
 .. note::
@@ -2216,10 +2212,6 @@ normally supports it).
 
 Returns ``objs`` as cast to a list, in the same order as provided.
 
-.. versionchanged:: 3.1
-
-    Support for the fetching primary key attributes on MariaDB 10.5+ was added.
-
 ``bulk_update()``
 ~~~~~~~~~~~~~~~~~
 
@@ -2742,11 +2734,6 @@ adverse effects on your database. For example, the ``ANALYZE`` flag supported
 by MariaDB, MySQL 8.0.18+, and PostgreSQL could result in changes to data if
 there are triggers or if a function is called, even for a ``SELECT`` query.
 
-.. versionchanged:: 3.1
-
-    Support for the ``'TREE'`` format on MySQL 8.0.16+ and ``analyze`` option
-    on MariaDB and MySQL 8.0.18+ were added.
-
 .. _field-lookups:
 
 ``Field`` lookups
@@ -3273,8 +3260,6 @@ in the database <database-time-zone-definitions>`.
 ``iso_week_day``
 ~~~~~~~~~~~~~~~~
 
-.. versionadded:: 3.1
-
 For date and datetime fields, an exact ISO 8601 day of the week match. Allows
 chaining additional field lookups.
 
diff --git a/docs/ref/models/relations.txt b/docs/ref/models/relations.txt
index 1e81352c69..1c2591cc0c 100644
--- a/docs/ref/models/relations.txt
+++ b/docs/ref/models/relations.txt
@@ -75,10 +75,6 @@ Related objects reference
         dictionary and they will be evaluated once before creating any
         intermediate instance(s).
 
-        .. versionchanged:: 3.1
-
-            ``through_defaults`` values can now be callables.
-
     .. method:: create(through_defaults=None, **kwargs)
 
         Creates a new object, saves it and puts it in the related object set.
@@ -114,10 +110,6 @@ Related objects reference
         needed. You can use callables as values in the ``through_defaults``
         dictionary.
 
-        .. versionchanged:: 3.1
-
-            ``through_defaults`` values can now be callables.
-
     .. method:: remove(*objs, bulk=True)
 
         Removes the specified model objects from the related object set::
@@ -208,10 +200,6 @@ Related objects reference
         dictionary and they will be evaluated once before creating any
         intermediate instance(s).
 
-        .. versionchanged:: 3.1
-
-            ``through_defaults`` values can now be callables.
-
     .. note::
 
        Note that ``add()``, ``create()``, ``remove()``, ``clear()``, and
diff --git a/docs/ref/paginator.txt b/docs/ref/paginator.txt
index 4cc5483828..7758234d6e 100644
--- a/docs/ref/paginator.txt
+++ b/docs/ref/paginator.txt
@@ -17,10 +17,6 @@ classes live in :source:`django/core/paginator.py`.
     A paginator acts like a sequence of :class:`Page` when using ``len()`` or
     iterating it directly.
 
-    .. versionchanged:: 3.1
-
-        Support for iterating over ``Paginator`` was added.
-
 .. attribute:: Paginator.object_list
 
     Required. A list, tuple, ``QuerySet``, or other sliceable object with a
diff --git a/docs/ref/request-response.txt b/docs/ref/request-response.txt
index 4528373b8c..819272bd6e 100644
--- a/docs/ref/request-response.txt
+++ b/docs/ref/request-response.txt
@@ -406,8 +406,6 @@ Methods
 
 .. method:: HttpRequest.accepts(mime_type)
 
-    .. versionadded:: 3.1
-
     Returns ``True`` if the request ``Accept`` header matches the ``mime_type``
     argument::
 
@@ -911,10 +909,6 @@ Methods
     .. _HttpOnly: https://owasp.org/www-community/HttpOnly
     .. _SameSite: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite
 
-    .. versionchanged:: 3.1
-
-        Using ``samesite='None'`` (string) was allowed.
-
     .. warning::
 
         :rfc:`RFC 6265 <6265#section-6.1>` states that user agents should
@@ -932,10 +926,6 @@ Methods
     you will need to remember to pass it to the corresponding
     :meth:`HttpRequest.get_signed_cookie` call.
 
-    .. versionchanged:: 3.1
-
-        Using ``samesite='None'`` (string) was allowed.
-
 .. method:: HttpResponse.delete_cookie(key, path='/', domain=None, samesite=None)
 
     Deletes the cookie with the given key. Fails silently if the key doesn't
@@ -945,10 +935,6 @@ Methods
     values you used in ``set_cookie()`` -- otherwise the cookie may not be
     deleted.
 
-    .. versionchanged:: 2.2.15
-
-        The ``samesite`` argument was added.
-
 .. method:: HttpResponse.close()
 
     This method is called at the end of the request directly by the WSGI
diff --git a/docs/ref/settings.txt b/docs/ref/settings.txt
index 5fdb76b2d0..55773d5c9b 100644
--- a/docs/ref/settings.txt
+++ b/docs/ref/settings.txt
@@ -99,11 +99,6 @@ This validation only applies via :meth:`~django.http.HttpRequest.get_host()`;
 if your code accesses the ``Host`` header directly from ``request.META`` you
 are bypassing this security protection.
 
-.. versionchanged:: 3.1
-
-    If ``ALLOWED_HOSTS`` is empty and ``DEBUG=True``, subdomains of localhost
-    were allowed.
-
 .. setting:: APPEND_SLASH
 
 ``APPEND_SLASH``
@@ -387,10 +382,6 @@ cookie from being sent in cross-site requests.
 
 See :setting:`SESSION_COOKIE_SAMESITE` for details about ``SameSite``.
 
-.. versionchanged:: 3.1
-
-    Setting ``CSRF_COOKIE_SAMESITE = 'None'`` was allowed.
-
 .. setting:: CSRF_COOKIE_SECURE
 
 ``CSRF_COOKIE_SECURE``
@@ -688,10 +679,6 @@ When :setting:`USE_TZ` is ``False``, it is an error to set this option.
   Consider converting to local time explicitly with ``AT TIME ZONE`` in raw SQL
   queries instead of setting the ``TIME_ZONE`` option.
 
-.. versionchanged:: 3.1
-
-  Using this option when the database backend supports time zones was allowed.
-
 .. setting:: DATABASE-DISABLE_SERVER_SIDE_CURSORS
 
 ``DISABLE_SERVER_SIDE_CURSORS``
@@ -786,8 +773,6 @@ on :ref:`controlling the creation order of test databases
 ``MIGRATE``
 ^^^^^^^^^^^
 
-.. versionadded:: 3.1
-
 Default: ``True``
 
 When set to ``False``, migrations won't run when creating the test database.
@@ -1161,10 +1146,6 @@ precedence and will be applied instead.
 
 See also :setting:`DATE_INPUT_FORMATS` and :setting:`TIME_INPUT_FORMATS`.
 
-.. versionchanged:: 3.1
-
-    In older versions, the default is a list containing also date-only formats.
-
 .. setting:: DEBUG
 
 ``DEBUG``
@@ -1272,8 +1253,6 @@ manually specified. Used when constructing the ``Content-Type`` header.
 ``DEFAULT_EXCEPTION_REPORTER``
 ------------------------------
 
-.. versionadded:: 3.1
-
 Default: ``'``:class:`django.views.debug.ExceptionReporter`\ ``'``
 
 Default exception reporter class to be used if none has been assigned to the
@@ -1317,8 +1296,6 @@ and :setting:`MANAGERS`; for that, see :setting:`SERVER_EMAIL`.
 ``DEFAULT_HASHING_ALGORITHM``
 -----------------------------
 
-.. versionadded:: 3.1
-
 Default: ``'sha256'``
 
 Default hashing algorithm to use for encoding cookies, password reset tokens in
@@ -1385,10 +1362,6 @@ Default: Not defined
 The directory used by the :ref:`file email backend <topic-email-file-backend>`
 to store output files.
 
-.. versionchanged:: 3.1
-
-    Support for :class:`pathlib.Path` was added.
-
 .. setting:: EMAIL_HOST
 
 ``EMAIL_HOST``
@@ -1910,10 +1883,6 @@ cookie from being sent in cross-site requests.
 
 See :setting:`SESSION_COOKIE_SAMESITE` for details about ``SameSite``.
 
-.. versionchanged:: 3.1
-
-    Setting ``LANGUAGE_COOKIE_SAMESITE = 'None'`` was allowed.
-
 .. setting:: LANGUAGE_COOKIE_SECURE
 
 ``LANGUAGE_COOKIE_SECURE``
@@ -2422,10 +2391,6 @@ If configured, the :class:`~django.middleware.security.SecurityMiddleware` sets
 the :ref:`referrer-policy` header on all responses that do not already have it
 to the value provided.
 
-.. versionchanged:: 3.1
-
-    In older versions, the default value is ``None``.
-
 .. setting:: SECURE_SSL_HOST
 
 ``SECURE_SSL_HOST``
@@ -2986,8 +2951,6 @@ rendered.
 ``PASSWORD_RESET_TIMEOUT``
 --------------------------
 
-.. versionadded:: 3.1
-
 Default: ``259200`` (3 days, in seconds)
 
 The number of seconds a password reset link is valid for.
@@ -3267,10 +3230,6 @@ Possible values for the setting are:
     Modern browsers provide a more secure default policy for the ``SameSite``
     flag and will assume ``Lax`` for cookies without an explicit value set.
 
-.. versionchanged:: 3.1
-
-    Setting ``SESSION_COOKIE_SAMESITE = 'None'`` was allowed.
-
 .. _SameSite: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite
 
 .. setting:: SESSION_COOKIE_SECURE
diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 02b63db248..d431a9bc42 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -729,10 +729,6 @@ available to the included template::
     been evaluated and rendered* - not blocks that can be overridden by, for
     example, an extending template.
 
-.. versionchanged:: 3.1
-
-    Support for iterables of template names was added.
-
 .. templatetag:: load
 
 ``load``
@@ -1747,11 +1743,6 @@ example, when the active locale is ``en`` (English):
 Using ``floatformat`` with no argument is equivalent to using ``floatformat``
 with an argument of ``-1``.
 
-.. versionchanged:: 3.1
-
-    In older versions, a negative zero ``-0`` was returned for negative numbers
-    which round to zero.
-
 .. versionchanged:: 3.2
 
     The ``g`` suffix to force grouping by thousand separators was added.
diff --git a/docs/ref/utils.txt b/docs/ref/utils.txt
index 921aba5de8..f88fc7f9e7 100644
--- a/docs/ref/utils.txt
+++ b/docs/ref/utils.txt
@@ -43,11 +43,6 @@ need to distinguish caches by the ``Accept-language`` header.
     * All other parameters are added with their value, after applying
       ``str()`` to it.
 
-    .. versionchanged:: 3.1
-
-        Support for multiple field names in the ``no-cache`` directive was
-        added.
-
 .. function:: get_max_age(response)
 
     Returns the max-age from the response Cache-Control header as an integer
@@ -131,10 +126,6 @@ The functions defined in this module share the following properties:
     UTC offsets aren't supported; if ``value`` describes one, the result is
     ``None``.
 
-    .. versionchanged:: 3.1
-
-        Support for comma separators for milliseconds was added.
-
 .. function:: parse_datetime(value)
 
     Parses a string and returns a :class:`datetime.datetime`.
@@ -142,10 +133,6 @@ The functions defined in this module share the following properties:
     UTC offsets are supported; if ``value`` describes one, the result's
     ``tzinfo`` attribute is a :class:`datetime.timezone` instance.
 
-    .. versionchanged:: 3.1
-
-        Support for comma separators for milliseconds was added.
-
 .. function:: parse_duration(value)
 
     Parses a string and returns a :class:`datetime.timedelta`.
@@ -155,11 +142,6 @@ The functions defined in this module share the following properties:
     ``P4DT1H15M20S`` which is equivalent to ``4 1:15:20``) or PostgreSQL's
     day-time interval format (e.g. ``3 days 04:05:06``).
 
-    .. versionchanged:: 3.1
-
-        Support for comma separators for decimal fractions in the ISO 8601
-        format and for the format ``"DD HH:MM:SS,uuuuuu"`` was added.
-
 ``django.utils.decorators``
 ===========================
 
@@ -204,24 +186,18 @@ The functions defined in this module share the following properties:
 
 .. function:: sync_only_middleware(middleware)
 
-    .. versionadded:: 3.1
-
     Marks a middleware as :ref:`synchronous-only <async-middleware>`. (The
     default in Django, but this allows you to future-proof if the default ever
     changes in a future release.)
 
 .. function:: async_only_middleware(middleware)
 
-    .. versionadded:: 3.1
-
     Marks a middleware as :ref:`asynchronous-only <async-middleware>`. Django
     will wrap it in an asynchronous event loop when it is called from the WSGI
     request path.
 
 .. function:: sync_and_async_middleware(middleware)
 
-    .. versionadded:: 3.1
-
     Marks a middleware as :ref:`sync and async compatible <async-middleware>`,
     this allows to avoid converting requests. You must implement detection of
     the current request type to use this decorator. See :ref:`asynchronous
@@ -321,10 +297,6 @@ The functions defined in this module share the following properties:
 
     Returns an ASCII string containing the encoded result.
 
-    .. versionchanged:: 3.1
-
-        Support for :class:`pathlib.Path` ``path`` was added.
-
 .. function:: escape_uri_path(path)
 
     Escapes the unsafe characters from the path portion of a Uniform Resource
@@ -550,8 +522,6 @@ https://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004
 
 .. class:: classproperty(method=None)
 
-    .. versionadded:: 3.1
-
     Similar to :py:func:`@classmethod <classmethod>`, the ``@classproperty``
     decorator converts the result of a method with a single ``cls`` argument
     into a property that can be accessed directly from the class.