Update urls.py because of new version of Django. (celery#5396)

FYI patterns have been removed in Django 1.10.
See release 1.10 notes: https://docs.djangoproject.com/en/2.0/releases/1.10/

examples/django/proj/urls.py

@@ -1,15 +1,14 @@
 from __future__ import absolute_import, unicode_literals
 
 from django.conf.urls import (  # noqa
-    patterns, include, url, handler404, handler500,
+    include, url, handler404, handler500,
 )
 
 # Uncomment the next two lines to enable the admin:
 # from django.contrib import admin
 # admin.autodiscover()
 
-urlpatterns = patterns(
-    '',
+urlpatterns = [
     # Examples:
     # url(r'^$', 'proj.views.home', name='home'),
     # url(r'^proj/', include('proj.foo.urls')),
@@ -19,4 +18,4 @@
 
     # Uncomment the next line to enable the admin:
     # url(r'^admin/', include(admin.site.urls)),
-)
+]