[PRQ#48600] Deletion Request for openmodelica-omshell

MarsSeed [1] filed a deletion request for openmodelica-omshell [2]: Cleanup of defunct separate OpenModelica packages created before 2019. Upstream migrated to a new monorepo, split repos got discontinued and archived in 2019. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/openmodelica-omshell/