Removed some 1.3 compatability code

Author: macro1

simple_history/admin.py

@@ -1,10 +1,7 @@
 from __future__ import unicode_literals
 
 from django.core.exceptions import PermissionDenied
-try:
-    from django.conf.urls import patterns, url
-except ImportError:
-    from django.conf.urls.defaults import patterns, url
+from django.conf.urls import patterns, url
 from django.contrib import admin
 from django.contrib.admin import helpers
 from django.contrib.contenttypes.models import ContentType

simple_history/tests/urls.py

@@ -1,10 +1,6 @@
 from __future__ import unicode_literals
 
-try:
-    from django.conf.urls import include, url
-except ImportError:
-    from django.conf.urls.defaults import include, url
-
+from django.conf.urls import include, url
 from django.contrib import admin
 from . import other_admin