Fixed #5918 -- Removed `SortedDictFromList` since `SortedDict` now can do...

Fixed #5918 -- Removed `SortedDictFromList` since `SortedDict` now can do everything `SortedDictFromList` could do.  Since `SortedDict`'s `copy` method doesn't return a deepcopy as `SortedDictFromList`'s `copy` method did, you will need to update your code if you were relying on `SortedDictFromList.copy` to return a deepcopy by using the `deepcopy` function from the `copy` module.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6668 bcc190cf-cafb-0310-a4f2-bffc1f526a37