PEP8 cleanups.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/common/managers.py

@@ -2,7 +2,6 @@ from __future__ import unicode_literals
 
 from django.apps import apps
 from django.contrib.contenttypes.fields import GenericRelation
-from django.conf import settings
 from django.db import models
 
 

mayan/apps/common/permissions_runtime.py

@@ -9,4 +9,3 @@ namespace = PermissionNamespace('common', _('Common'))
 permission_error_log_view = namespace.add_permission(
     name='error_log_view', label=_('View errorr log')
 )
-

mayan/apps/common/tests/test_views.py

@@ -2,18 +2,14 @@ from __future__ import absolute_import, unicode_literals
 
 from django.conf.urls import url
 from django.contrib.auth import get_user_model
-from django.contrib.auth.models import Group
 from django.http import HttpResponse
 from django.template import Context, Template
 from django.test.utils import ContextList
 from django.urls import clear_url_caches, reverse
 
-from acls.models import AccessControlList
-from permissions.models import Role
-from permissions.tests.literals import TEST_ROLE_LABEL
 from user_management.tests import (
-    TEST_ADMIN_PASSWORD, TEST_ADMIN_USERNAME, TEST_ADMIN_EMAIL,
-    TEST_GROUP_NAME, TEST_USER_EMAIL, TEST_USER_USERNAME, TEST_USER_PASSWORD
+    TEST_ADMIN_PASSWORD, TEST_ADMIN_USERNAME, TEST_USER_USERNAME,
+    TEST_USER_PASSWORD
 )
 
 from .base import BaseTestCase