Remove anonymous user support

mayan/apps/common/managers.py

@@ -1,12 +0,0 @@
-from __future__ import unicode_literals
-
-from django.db import models
-from django.contrib.auth.models import AnonymousUser
-
-
-class AnonymousUserSingletonManager(models.Manager):
-    def passthru_check(self, user):
-        if isinstance(user, AnonymousUser):
-            return self.model.objects.get()
-        else:
-            return user