Removed versionadded/changed annotations for 5.0.

This also removes remaining versionadded/changed annotations for older
versions.

docs/ref/contrib/gis/functions.txt

@@ -257,8 +257,6 @@ value of the geometry.
 ``ClosestPoint``
 ================
 
-.. versionadded:: 5.0
-
 .. class:: ClosestPoint(expr1, expr2, **extra)
 
 *Availability*: `PostGIS <https://postgis.net/docs/ST_ClosestPoint.html>`__,

docs/ref/contrib/gis/geoquerysets.txt

@@ -879,10 +879,6 @@ aggregate, except it can be several orders of magnitude faster than performing
 a union because it rolls up geometries into a collection or multi object, not
 caring about dissolving boundaries.
 
-.. versionchanged:: 5.0
-
-    Support for using the ``filter`` argument was added.
-
 .. versionchanged:: 5.1
 
     MySQL 8.0.24+ support was added.
@@ -906,10 +902,6 @@ Example:
     >>> print(qs["poly__extent"])
     (-96.8016128540039, 29.7633724212646, -95.3631439208984, 32.782058715820)
 
-.. versionchanged:: 5.0
-
-    Support for using the ``filter`` argument was added.
-
 ``Extent3D``
 ~~~~~~~~~~~~
 
@@ -929,10 +921,6 @@ Example:
     >>> print(qs["poly__extent3d"])
     (-96.8016128540039, 29.7633724212646, 0, -95.3631439208984, 32.782058715820, 0)
 
-.. versionchanged:: 5.0
-
-    Support for using the ``filter`` argument was added.
-
 ``MakeLine``
 ~~~~~~~~~~~~
 
@@ -952,10 +940,6 @@ Example:
     >>> print(qs["poly__makeline"])
     LINESTRING (-95.3631510000000020 29.7633739999999989, -96.8016109999999941 32.7820570000000018)
 
-.. versionchanged:: 5.0
-
-    Support for using the ``filter`` argument was added.
-
 ``Union``
 ~~~~~~~~~
 
@@ -983,10 +967,6 @@ Example:
     ...     Union(poly)
     ... )  # A more sensible approach.
 
-.. versionchanged:: 5.0
-
-    Support for using the ``filter`` argument was added.
-
 .. rubric:: Footnotes
 .. [#fnde9im] *See* `OpenGIS Simple Feature Specification For SQL <https://portal.ogc.org/files/?artifact_id=829>`_, at Ch. 2.1.13.2, p. 2-13 (The Dimensionally Extended Nine-Intersection Model).
 .. [#fnsdorelate] *See* `SDO_RELATE documentation <https://docs.oracle.com/en/

docs/ref/contrib/gis/geos.txt

@@ -484,8 +484,6 @@ return a boolean.
 
 .. method:: GEOSGeometry.equals_identical(other)
 
-    .. versionadded:: 5.0
-
     Returns ``True`` if the two geometries are point-wise equivalent by
     checking that the structure, ordering, and values of all vertices are
     identical in all dimensions. ``NaN`` values are considered to be equal to