PEP8 cleanup, unused imports, missing imports, style cleanups

mayan/apps/rest_api/serializers.py

@@ -1,9 +1,6 @@
 from __future__ import absolute_import
 
-from django.contrib.auth.models import Group, User
-
 from rest_framework import serializers
-from rest_framework.reverse import reverse
 
 
 class APISerializer(serializers.Serializer):
@@ -18,4 +15,3 @@ class APIAppSerializer(serializers.Serializer):
 
 class APIVersionSerializer(serializers.Serializer):
     apps = APIAppSerializer()
-