Removed versionadded/changed annotations for 4.0.

docs/ref/contrib/admin/admindocs.txt

@@ -55,10 +55,6 @@ system along with all the fields, properties, and methods available on it.
 Relationships to other models appear as hyperlinks. Descriptions are pulled
 from ``help_text`` attributes on fields or from docstrings on model methods.
 
-.. versionchanged:: 4.0
-
-    Older versions don't display model cached properties.
-
 A model with useful documentation might look like this::
 
     class BlogEntry(models.Model):

docs/ref/contrib/admin/index.txt

@@ -1203,8 +1203,6 @@ subclass::
 
 .. attribute:: ModelAdmin.search_help_text
 
-    .. versionadded:: 4.0
-
     Set ``search_help_text`` to specify a descriptive text for the search box
     which will be displayed below it.
 
@@ -1938,8 +1936,6 @@ templates used by the :class:`ModelAdmin` views:
 
 .. method:: ModelAdmin.get_formset_kwargs(request, obj, inline, prefix)
 
-    .. versionadded:: 4.0
-
     A hook for customizing the keyword arguments passed to the constructor of a
     formset. For example, to pass ``request`` to formset forms::
 
@@ -2091,10 +2087,6 @@ forms or widgets depending on ``django.jQuery`` must specify
 ``js=['admin/js/jquery.init.js', …]`` when :ref:`declaring form media assets
 <assets-as-a-static-definition>`.
 
-.. versionchanged:: 4.0
-
-    jQuery was upgraded from 3.5.1 to 3.6.0.
-
 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
@@ -2310,10 +2302,6 @@ The ``InlineModelAdmin`` class adds or customizes:
     :attr:`.InlineModelAdmin.verbose_name` is defined, Django will use
     :attr:`.InlineModelAdmin.verbose_name` + ``'s'``.
 
-    .. versionchanged:: 4.0
-
-        The fallback to :attr:`.InlineModelAdmin.verbose_name` was added.
-
 .. attribute:: InlineModelAdmin.can_delete
 
     Specifies whether or not inline objects can be deleted in the inline.
@@ -2895,10 +2883,6 @@ Templates can override or extend base admin templates as described in
       * ``admin_url``: admin changelist URL for the model
       * ``add_url``: admin URL to add a new model instance
 
-    .. versionchanged:: 4.0
-
-        The ``model`` variable for each model was added.
-
 .. method:: AdminSite.get_app_list(request, app_label=None)
 
     Returns a list of applications from the :doc:`application registry