Removed the import of `DEFAULT_CACHE_ALIAS` that redefines a previous import
Removed the import of `DEFAULT_CACHE_ALIAS` that redefines a previous import

The GetCacheTests test case import the constant `DEFAULT_CACHE_ALIAS`
inside one of its test methods, redefining a previous import. Removing
this second import does not break the test.

zedr/django,zedr/django,zedr/django