[PATCH] Remove Python 2.4 and 2.5 support

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tom@tromey.com> writes:

>>>>> "Kevin" == Kevin Buettner <kevinb@redhat.com> writes:
Tom> I don't have a good way to test that Python 2.6 still works.

Kevin> I don't either.  Eli said that he regularly builds and tests using
Kevin> 2.6 though.

Tom> I won't be putting this in until after the 8.3 branch is made anyway --
Tom> it's hardly critical.  So, if there are problems, we'll have plenty of
Tom> time to correct them.

I'm going to check this in now.

Tom