Qinling project is retiring in Wallaby cycle[1].
This commit removes the ansible roles 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: I6543bacff638b1649511f7e779807954c34ef570