flake8 fixes (unused imports and variables).

django/contrib/auth/tests/test_basic.py

@@ -6,7 +6,6 @@ from django.contrib.auth.models import User, AnonymousUser
 from django.contrib.auth.tests.custom_user import CustomUser
 from django.contrib.auth.tests.utils import skipIfCustomUser
 from django.core.exceptions import ImproperlyConfigured
-from django.core.management import call_command
 from django.dispatch import receiver
 from django.test import TestCase, override_settings
 from django.test.signals import setting_changed

django/contrib/auth/tests/test_management.py

@@ -327,8 +327,6 @@ class CreatesuperuserManagementCommandTestCase(TestCase):
         available on self.stdin.
         If no such option is passed, it defaults to sys.stdin.
         """
-
-        user_data = {'username': 'foo', 'email': 'foo@example.com'}
         sentinel = object()
         command = createsuperuser.Command()
         command.execute(

tests/user_commands/tests.py

@@ -2,7 +2,6 @@ import sys
 
 from django.core import management
 from django.core.management import CommandError
-from django.core.management.base import BaseCommand
 from django.core.management.utils import popen_wrapper
 from django.test import SimpleTestCase
 from django.utils import translation