[PRQ#67815] Deletion Request for libosso

MarsSeed [1] filed a deletion request for libosso [2]: Abandoned since 2019; upstream is unmaintained since that year. Maemo/Hildon community fork seems mostly EOL for 2+ years, and are now unbuildable on Arch. See related deletion request for its broken direct consumer, hildon- thumbnail (PRQ#67814), and related deletion requests PRQ#67811 and PRQ#67812. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libosso/