PEP8 cleanup, unused imports, missing imports, style cleanups

mayan/apps/permissions/views.py

@@ -6,7 +6,7 @@ import operator
 from django.contrib import messages
 from django.contrib.auth.models import User, Group
 from django.contrib.contenttypes.models import ContentType
-from django.core.urlresolvers import reverse, reverse_lazy
+from django.core.urlresolvers import reverse_lazy
 from django.http import HttpResponseRedirect, Http404
 from django.shortcuts import render_to_response, get_object_or_404
 from django.template import RequestContext