[PRQ#50853] Deletion Request for postgresql11

MarsSeed [1] filed a deletion request for postgresql11 [2]: EOL as of November 9, 2023. Nothing depends on it. So it is safe to delete now, just like its duplicates: - postgresql-11 (PRQ#50666) - postgresql-lts (PRQ#47788) [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/postgresql11/