Removed unused imports

src/pretix/presale/views/__init__.py

@@ -3,7 +3,6 @@ from itertools import groupby
 
 from django.contrib.auth.views import redirect_to_login
 from django.core.urlresolvers import reverse
-from django.db.models import Q
 from django.utils.functional import cached_property
 from django.utils.timezone import now
 

src/pretix/presale/views/cart.py

@@ -1,7 +1,4 @@
-import json
-
 from django.contrib import messages
-from django.contrib.auth.views import redirect_to_login
 from django.core.urlresolvers import reverse
 from django.shortcuts import redirect
 from django.utils.translation import ugettext_lazy as _

src/pretix/presale/views/order.py

@@ -2,7 +2,6 @@ from datetime import timedelta
 
 from django.contrib import messages
 from django.core.urlresolvers import reverse
-from django.db.models import Q
 from django.http import Http404
 from django.shortcuts import redirect
 from django.utils.functional import cached_property