Removed obsolete warning filter (#1223)

Author: sliverc

setup.cfg

@@ -66,9 +66,6 @@ filterwarnings =
     # Django filter schema generation. Can be removed once we remove
     # schema support
     ignore:Built-in schema generation is deprecated.
-    # can be removed once django filter has released a new version including
-    # https://github.com/carltongibson/django-filter/pull/1623
-    ignore:'pkgutil.find_loader' is deprecated and slated for removal
 testpaths =
     example
     tests