Removed message about compatibility with 2.3.

Lib/decimal.py

@@ -7,18 +7,14 @@
 #    and Aahz <aahz at pobox.com>
 #    and Tim Peters
 
-# This module is currently Py2.3 compatible and should be kept that way
-# unless a major compelling advantage arises.  IOW, 2.3 compatibility is
-# strongly preferred, but not guaranteed.
-
-# Also, this module should be kept in sync with the latest updates of
-# the IBM specification as it evolves.  Those updates will be treated
+# This module should be kept in sync with the latest updates of the
+# IBM specification as it evolves.  Those updates will be treated
 # as bug fixes (deviation from the spec is a compatibility, usability
 # bug) and will be backported.  At this point the spec is stabilizing
 # and the updates are becoming fewer, smaller, and less significant.
 
 """
-This is a Py2.3 implementation of decimal floating point arithmetic based on
+This is an implementation of decimal floating point arithmetic based on
 the General Decimal Arithmetic Specification:
 
     www2.hursley.ibm.com/decimal/decarith.html