Fix absolute urls for swagger-ui oauth settings

testproj/users/migrations/0002_setup_oauth2_apps.py

@@ -1,9 +1,6 @@
 # Generated by Django 2.1.3 on 2018-12-19 07:57
 from django.conf import settings
-from django.contrib.staticfiles.templatetags.staticfiles import static
-from django.db import migrations, IntegrityError
-
-from testproj.util import full_url_lazy
+from django.db import migrations
 
 
 def add_oauth_apps(apps, schema_editor):