Revert 7254762 (GH-6494) (GH-6496)

This note in documentation was never true.
(cherry picked from commit a00d440)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

Doc/library/configparser.rst

@@ -1106,10 +1106,6 @@ ConfigParser Objects
       given *section*.  Optional arguments have the same meaning as for the
       :meth:`get` method.
 
-      .. versionchanged:: 3.2
-         Items present in *vars* no longer appear in the result.  The previous
-         behaviour mixed actual parser options with variables provided for
-         interpolation.
 
    .. method:: set(section, option, value)