Refs #23919 -- Removed six.<various>_types usage

Thanks Tim Graham and Simon Charette for the reviews.

1 files changed, 2 insertions, 2 deletions

diff --git a/django/db/models/options.py b/django/db/models/options.py
index a4593d125a..cf3e031104 100644
--- a/django/db/models/options.py
+++ b/django/db/models/options.py
@@ -310,7 +310,7 @@ class Options(object):
         """
         if self.proxy or self.swapped or not self.managed:
             return False
-        if isinstance(connection, six.string_types):
+        if isinstance(connection, str):
             connection = connections[connection]
         if self.required_db_vendor:
             return self.required_db_vendor == connection.vendor
@@ -689,7 +689,7 @@ class Options(object):
                 if f.is_relation and f.related_model is not None
             )
             for f in fields_with_relations:
-                if not isinstance(f.remote_field.model, six.string_types):
+                if not isinstance(f.remote_field.model, str):
                     related_objects_graph[f.remote_field.model._meta.concrete_model._meta].append(f)
 
         for model in all_models: