[PRQ#50326] Deletion Request for python-ceilometerclient

MarsSeed [1] filed a deletion request for python-ceilometerclient [2]: Retired since 2017; not needed anymore. [a] [a]: https://opendev.org/openstack/python- ceilometerclient/commits/branch/master/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-ceilometerclient/