remove atomic=False where it is obviously not needed)

src/documents/migrations/0020_document_added.py

@@ -12,7 +12,6 @@ def set_added_time_to_created_time(apps, schema_editor):
         doc.save()
 
 class Migration(migrations.Migration):
-    atomic = False
     dependencies = [
         ('documents', '0019_add_consumer_user'),
     ]