Fixed duplicate-named contrib.sessions tests, and removed unused import (cleanup from doctest conversion).
Fixed duplicate-named contrib.sessions tests, and removed unused import (cleanup from doctest conversion).

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@15377 bcc190cf-cafb-0310-a4f2-bffc1f526a37

mitsuhiko/django,skevy/django,disqus/django-old,django-nonrel/django-nonrel,Instagram/django,Instagram/django,mitsuhiko/django,skevy/django,django-nonrel/django-nonrel,django-nonrel/django-nonrel,skevy/django,Instagram/django,mitsuhiko/django,disqus/django-old,jamespacileo/django-france,disqus/django-old,jamespacileo/django-france,jamespacileo/django-france