Fixed #8206 -- Removed validate methods of Model and Model fields. They are...

Fixed #8206 -- Removed validate methods of Model and Model fields. They are are unsupported for 1.0 and will be replaced with more complete model validation (refs #6845).


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8348 bcc190cf-cafb-0310-a4f2-bffc1f526a37