remove unused file

core/decorators.py

@@ -1,10 +0,0 @@
-from django.http import Http404
-
-
-def superuser_required(old_function):
-    def new_function(request, *args, **kwargs):
-        if request.user.is_superuser:
-            return old_function(request)
-        else:
-            raise Http404
-    return new_function