[PRQ#64645] Deletion Request for libast

MarsSeed [1] filed a deletion request for libast [2]: Cleanup after the broken eterm from 2015 (PRQ#64643). Flagged as broken since 2023-04-13: former hosting website eterm.org no longer carries the release tarball. The package has no other reverse dependencies beside AUR/eterm. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libast/