diff --git a/teams/backends.py b/teams/backends.py
deleted file mode 100644
index 9770a1b..0000000
--- a/teams/backends.py
+++ /dev/null
@@ -1,34 +0,0 @@
-from django.db.models import Q
-
-from .models import Team, Membership
-
-
-class TeamPermissionsBackend(object):
-
-    def authenticate(self, username=None, password=None):
-        return None
-
-    def get_team_permissions(self, user_obj, obj=None):
-        """
-        Returns a set of permission strings that this user has through his/her
-        team memberships.
-        """
-        if user_obj.is_anonymous() or obj is not None:
-            return set()
-        if not hasattr(user_obj, "_team_perm_cache"):
-            memberships = Team.objects.filter(
-                Q(memberships__user=user_obj),
-                Q(memberships__state=Membership.STATE_MANAGER) |
-                Q(memberships__state=Membership.STATE_MEMBER),
-            )
-            perms = memberships.values_list(
-                "permissions__content_type__app_label",
-                "permissions__codename"
-            ).order_by()
-            user_obj._team_perm_cache = set(["%s.%s" % (ct, name) for ct, name in perms])
-        return user_obj._team_perm_cache
-
-    def has_perm(self, user_obj, perm, obj=None):
-        if not user_obj.is_active:
-            return False
-        return perm in self.get_team_permissions(user_obj, obj)