Remove retired Qinling support
Remove retired Qinling support

Qinling project is retiring in Wallaby cycle[1].
This commit removes the usages/support of Qinling project
before its code is removed.

Needed-By: https://review.opendev.org/c/openstack/qinling/+/764521

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-November/018638.html

Change-Id: I6172fb9c2394a7b2a142f937940ee5d90f591c82

openstack/pymod2pkg