Enable and fix lint

tests/unit/test_static_dynamic_segments.py

@@ -2,15 +2,14 @@ from __future__ import absolute_import, unicode_literals
 
 import datetime
 
-from django.forms.models import model_to_dict
-from django.contrib.sessions.backends.db import SessionStore
 import pytest
+from django.forms.models import model_to_dict
+
+from tests.factories.segment import SegmentFactory
 from wagtail_personalisation.forms import SegmentAdminForm
 from wagtail_personalisation.models import Segment
 from wagtail_personalisation.rules import TimeRule, VisitCountRule
 
-from tests.factories.segment import SegmentFactory
-
 
 def form_with_data(segment, *rules):
     model_fields = ['type', 'status', 'count', 'name', 'match_any']
@@ -63,6 +62,7 @@ def test_anonymous_user_not_added_to_static_segment_at_creation(site, client):
 
     assert not instance.static_users.all()
 
+
 @pytest.mark.django_db
 def test_match_any_correct_populates(site, client, django_user_model):
     user = django_user_model.objects.create(username='first')