remove bool(NotImplemented) from pending-removal

This raises a TypeError in 3.14, see gh-118767

Author: JostMigenda

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

@@ -15,7 +15,6 @@ although there is currently no date scheduled for their removal.
 
 * :mod:`builtins`:
 
-  * ``bool(NotImplemented)``.
   * Generators: ``throw(type, exc, tb)`` and ``athrow(type, exc, tb)``
     signature is deprecated: use ``throw(exc)`` and ``athrow(exc)`` instead,
     the single argument signature.