Remove Python 2.6 classifier
Remove Python 2.6 classifier

Neutron does not support Python 2.6 anymore starting with Kilo and might
not work correctly with it, so remove the classifier.

Change-Id: Ib7cddecdbec2c5152fe526bada6587129cf63ffd

stackforge/networking-plumgrid,fawadkhaliq/networking-plumgrid,msagheer/networking-plumgrid,openstack/networking-plumgrid,stackforge/networking-plumgrid,msagheer/networking-plumgrid,openstack/networking-plumgrid,fawadkhaliq/networking-plumgrid