Remove dropped django packages from groups

Author: irushchyshyn

data/groups.yaml

@@ -379,11 +379,9 @@ django:
     - python-django-rest-framework-braces
     - python-django-reversion
     - python-django-robots
-    - python-django-sekizai
     - python-django-select2
     - python-django-setuptest
     - python-django-simple-captcha
-    - python-django-south
     - python-django-stopforumspam
     - python-django-tables2
     - python-django-tagging