drop dangling import.
@@ -7,7 +7,7 @@ from django.conf import settings
from django.contrib import messages
from django.contrib.auth import login, authenticate
from django.contrib.auth.models import User
-from django.core.exceptions import PermissionDenied, DisallowedHost, ObjectDoesNotExist
+from django.core.exceptions import PermissionDenied, DisallowedHost
from django.core.urlresolvers import reverse_lazy
from django.http import HttpResponseRedirect
from django.http.request import QueryDict
