diff --git a/permissions/models.py b/permissions/models.py
index f012f9f25..478fbdf9d 100644
--- a/permissions/models.py
+++ b/permissions/models.py
@@ -1,6 +1,3 @@
-# python imports
-import sets
-
 # django imports
 from django.db import models
 from django.contrib.auth.models import User