[3.13] gh-149096: Remove 'im_*' attribute reference from inspect module docstring (GH-149108) (#149440)

gh-149096: Remove  'im_*' attribute reference from inspect module docstring (GH-149108)

The im_class/func/self names were removed in 3.0.  The prefix appears nowhere else in inspect.py
and nowhere in inspect.rst.
(cherry picked from commit e444453)

Co-authored-by: Vineet Kumar <108144301+whyvineet@users.noreply.github.com>

Author: miss-islington

Lib/inspect.py

@@ -1,7 +1,7 @@
 """Get useful information from live Python objects.
 
 This module encapsulates the interface provided by the internal special
-attributes (co_*, im_*, tb_*, etc.) in a friendlier fashion.
+attributes (co_*, tb_*, etc.) in a friendlier fashion.
 It also provides some help for examining source code and class layout.
 
 Here are some of the useful functions provided by this module: