misc: don't use deprecated patterns object (#18562)

wcs/urls.py

@@ -15,12 +15,12 @@
 # along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 from django.conf import settings
-from django.conf.urls import patterns, url
+from django.conf.urls import url
 
-urlpatterns = patterns('',
+urlpatterns = [
     url(r'^$', 'wcs.views.home', name='home'),
     url(r'^backoffice/', 'wcs.views.backoffice'),
-)
+]
 
 # other URLs are handled by the quixote handler
-urlpatterns += patterns('', url(r'', 'wcs.compat.quixote', name='quixote'))
+urlpatterns.append(url(r'', 'wcs.compat.quixote', name='quixote'))