Removed two imports which are now unused

django/contrib/admin/forms.py

@@ -2,7 +2,6 @@ from __future__ import unicode_literals
 
 from django import forms
 
-from django.contrib.auth import authenticate
 from django.contrib.auth.forms import AuthenticationForm
 from django.utils.translation import ugettext_lazy as _
 

django/contrib/admin/sites.py

@@ -1,7 +1,7 @@
 from functools import update_wrapper
 from django.http import Http404, HttpResponseRedirect
 from django.contrib.admin import ModelAdmin, actions
-from django.contrib.auth import logout as auth_logout, REDIRECT_FIELD_NAME
+from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.contrib.auth.views import redirect_to_login
 from django.views.decorators.csrf import csrf_protect
 from django.db.models.base import ModelBase