Removed old change entries from 2.12, which introduced the Python 2.6 support

doc/CHANGES.rst

@@ -49,8 +49,6 @@ Restructuring
 - Removed the dependency on zope.app.publication in favor of new versions of
   zope.publisher and zope.traversing.
 
-- Requiring Python 2.6 officially
-
 - Changed startup server tests in Zope2 to use a randomized port number, to
   allow the nightly buildbot to run the tests at the same time for multiple
   configurations without the port being already in use.
@@ -125,7 +123,5 @@ Bugs Fixed
 
 - MailHost no longer generates garbage when given unicode input.
 
-- Made C extensions work for 64-bit Python 2.5.x / 2.6.x.
-
 - Unfutzed test failures due to use of naive timezones with ``datetime``
   instances.