Remove unnecessary documentation

Author: Jorewin

doc/source/whatsnew/v3.0.0.rst

@@ -29,8 +29,8 @@ enhancement2
 Other enhancements
 ^^^^^^^^^^^^^^^^^^
 - :func:`DataFrame.to_excel` now raises an ``UserWarning`` when the character count in a cell exceeds Excel's limitation of 32767 characters (:issue:`56954`)
-- :func:`assert_produces_warning` now accepts warning message match for every expected warning. A must_find_all_warnings keyword argument was added, to make the function check all expected warnings. (:issue:`56555`)
 - :func:`read_stata` now returns ``datetime64`` resolutions better matching those natively stored in the stata format (:issue:`55642`)
+-
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.notable_bug_fixes:

pandas/_testing/_warnings.py

@@ -79,8 +79,6 @@ class for all warnings. To raise multiple types of exceptions,
         type must get encountered. Otherwise, even one expected warning
         results in success.
 
-        .. versionadded:: 3.0.0
-
     Examples
     --------
     >>> import warnings