try to make pylint happy

dav_events/tests/generic.py

@@ -6,13 +6,12 @@ import os
 from django.apps import apps
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Group
-from django.db import models
 
 from ..models.event import Event
 from ..models.eventstatus import EventStatus
 
 
-class RoleMixin(object):
+class RoleMixin:
     def create_user_for_role(self, role_name, password, first_name, last_name):
         group = Group(name=role_name)
         group.save()
@@ -31,7 +30,7 @@ class RoleMixin(object):
         return user
 
 
-class EventMixin(object):
+class EventMixin:
     def get_status_label(self, status_code):
         return EventStatus.objects.get(code=status_code).label