Fixed #8511: Removed some tests that were failing on Python 2.4, but weren't...

Fixed #8511: Removed some tests that were failing on Python 2.4, but weren't really contributing anything anyway. Thanks to jarrow for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8508 bcc190cf-cafb-0310-a4f2-bffc1f526a37