[PRQ#51616] Deletion Request for python-mglib

MarsSeed [1] filed a deletion request for python-mglib [2]: Safe to delete this deprecated, unused library after AUR/papermerge no longer exists. (Currently there's a merge request for it: PRQ#49131. Its successor, papermerge-core doesn't need this lib.) [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-mglib/