Remove now unnecesary prepare method with wrong "connection" argument.
Remove now unnecesary prepare method with wrong "connection" argument.

djangonauts/django-hstore,Stranger6667/django-hstore,djangonauts/django-hstore,Stranger6667/django-hstore,pombredanne/django-hstore,djangonauts/django-hstore,Stranger6667/django-hstore,djangonauts/django-hstore,pombredanne/django-hstore,Stranger6667/django-hstore,pombredanne/django-hstore,pombredanne/django-hstore