Remove unused imports

aleksis/apps/postbuero/views.py

@@ -10,7 +10,7 @@ from django.views.generic.base import View
 import reversion
 from django_tables2 import SingleTableView
 from oauth2_provider.views.generic import ScopedProtectedResourceView
-from rest_framework import generics, permissions, viewsets
+from rest_framework import viewsets
 from rules.contrib.views import PermissionRequiredMixin
 
 from aleksis.core.mixins import AdvancedCreateView, AdvancedEditView