Remove unused import

Update mock requirement.

oidc_provider/urls.py

@@ -1,4 +1,4 @@
-from django.conf.urls import patterns, include, url
+from django.conf.urls import include, url
 from django.views.decorators.csrf import csrf_exempt
 from oidc_provider.views import *
 

setup.py

@@ -36,7 +36,7 @@ setup(
     ],
     tests_require=[
         'pyjwkest==1.1.0',
-        'mock==1.3.0',
+        'mock==2.0.0',
     ],
 
     install_requires=[