[3.13] gh-57281: Fix duplicate deprecation note: array 'u' format (GH-133113) (#133147)

gh-57281: Fix duplicate deprecation note: array 'u' format (GH-133113)
(cherry picked from commit 59ff421)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>

Author: miss-islington

Doc/deprecations/pending-removal-in-future.rst

@@ -7,8 +7,6 @@ although there is currently no date scheduled for their removal.
 * :mod:`argparse`: Nesting argument groups and nesting mutually exclusive
   groups are deprecated.
 
-* :mod:`array`'s ``'u'`` format code (:gh:`57281`)
-
 * :mod:`builtins`:
 
   * ``bool(NotImplemented)``.