Remove incorrect feature coverage comment from msgfmt script's docstring (python#112862)

Remove feature coverage comment from msgfmt script's docstring

msgfmt handles plural forms since cb081b8.

The comment was incorrectly applied in 637a33b -- original patch was from before the cb081b8 commit.

Co-authored-by: Tomas R. <[email protected]>

Author: m-aciek

Tools/i18n/msgfmt.py

@@ -5,8 +5,7 @@
 
 This program converts a textual Uniforum-style message catalog (.po file) into
 a binary GNU catalog (.mo file).  This is essentially the same function as the
-GNU msgfmt program, however, it is a simpler implementation.  Currently it
-does not handle plural forms but it does handle message contexts.
+GNU msgfmt program, however, it is a simpler implementation.
 
 Usage: msgfmt.py [OPTIONS] filename.po