Remove defunkt requirements

requirements.txt

-Django==1.4.1
-South==0.7.6
-argparse==1.2.1
-distribute==0.6.24
-dj-database-url==0.2.1
-gevent==0.13.8
-greenlet==0.4.0
-gunicorn==0.15.0
-psycopg2==2.4.5
-python-memcached==1.48
-wsgiref==0.1.2
+Django
+South
+argparse
+distribute
+wsgiref