Fixed #21302 -- Fixed unused imports and import *.

    ChoicesFieldListFilter, DateFieldListFilter, AllValuesFieldListFilter)

from django.utils.module_loading import autodiscover_modules

__all__ = [

    "register", "ACTION_CHECKBOX_NAME", "ModelAdmin", "HORIZONTAL", "VERTICAL",

    "StackedInline", "TabularInline", "AdminSite", "site", "ListFilter",

    "SimpleListFilter", "FieldListFilter", "BooleanFieldListFilter",

    "RelatedFieldListFilter", "ChoicesFieldListFilter", "DateFieldListFilter",

    "AllValuesFieldListFilter", "autodiscover",

]

def autodiscover():

    autodiscover_modules('admin', register_to=site)

from __future__ import unicode_literals

import re

from django.core.mail import send_mail

from django.core import validators

from django.conf import settings

from django.contrib.auth import models

from django.contrib.auth.decorators import login_required, permission_required

# Trigger CustomUser perm creation:

from django.contrib.auth.tests.custom_user import CustomUser

from django.contrib.auth.tests.test_views import AuthViewsTestCase

from django.contrib.auth.tests.utils import skipIfCustomUser

from django.core.exceptions import PermissionDenied

from django.contrib.auth import get_user_model

from django.contrib.auth.models import AbstractUser, Group, User, UserManager

from django.contrib.auth.tests.custom_user import IsActiveTestUser1

from django.contrib.auth.tests.utils import skipIfCustomUser

from django.core import mail

from django.db.models.signals import post_save

from django.contrib.auth import SESSION_KEY, REDIRECT_FIELD_NAME

from django.contrib.auth.forms import (AuthenticationForm, PasswordChangeForm,

                SetPasswordForm)

from django.contrib.auth.tests.custom_user import CustomUser

from django.contrib.auth.tests.utils import skipIfCustomUser

from django.contrib.auth.views import login as login_view