[PRQ#46156] Deletion Request for geant3

MarsSeed [1] filed a deletion request for geant3 [2]: Old legacy version from 2017; source not accessible (server requires authentication). AUR has the current version of geant4. Nothing depends on this old one. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/geant3/