Removed some outdated backwards compatibility imports and misleading comments.

EmptyResultSet moved in 46509cf13dbf049f75077981c29ef2c60b5a96ab.
FieldDoesNotExist moved in 8958170755b37ce346ae5257c1000bd936faa3b0.
BoundField and pretty_name moved in 8550161e531a603d57723850fb09c4c9b7ca60b9.
EMPTY_VALUES moved in 471596fc1afcb9c6258d317c619eaf5fd394e797.
BaseRunserverCommand moved in 5c53e30607014163872e89c221b206992a9acfef.

3 files changed, 2 insertions, 7 deletions

diff --git a/django/forms/fields.py b/django/forms/fields.py
index a977256525..03cd8af8d7 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -15,8 +15,6 @@ from urllib.parse import urlsplit, urlunsplit
 
 from django.core import validators
 from django.core.exceptions import ValidationError
-# Provide this import for backwards compatibility.
-from django.core.validators import EMPTY_VALUES  # NOQA
 from django.forms.boundfield import BoundField
 from django.forms.utils import from_current_timezone, to_current_timezone
 from django.forms.widgets import (
diff --git a/django/forms/forms.py b/django/forms/forms.py
index 0ab25643da..48b237611f 100644
--- a/django/forms/forms.py
+++ b/django/forms/forms.py
@@ -5,11 +5,8 @@ Form classes
 import copy
 
 from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
-# BoundField is imported for backwards compatibility in Django 1.9
-from django.forms.boundfield import BoundField  # NOQA
 from django.forms.fields import Field, FileField
-# pretty_name is imported for backwards compatibility in Django 1.9
-from django.forms.utils import ErrorDict, ErrorList, pretty_name  # NOQA
+from django.forms.utils import ErrorDict, ErrorList
 from django.forms.widgets import Media, MediaDefiningClass
 from django.utils.datastructures import MultiValueDict
 from django.utils.functional import cached_property
diff --git a/django/forms/utils.py b/django/forms/utils.py
index 8bfdd0a799..5ae137943a 100644
--- a/django/forms/utils.py
+++ b/django/forms/utils.py
@@ -2,7 +2,7 @@ import json
 from collections import UserList
 
 from django.conf import settings
-from django.core.exceptions import ValidationError  # backwards compatibility
+from django.core.exceptions import ValidationError
 from django.utils import timezone
 from django.utils.html import escape, format_html, format_html_join, html_safe
 from django.utils.translation import gettext_lazy as _