MarsSeed [1] filed a deletion request for antlr3-cpp-headers-git [2]: Unneeded legacy antlr v3 package. It was used by scylla from 2018, but that is a broken PKGBUILD pending deletion (PRQ#47180).
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/antlr3-cpp-headers-git/
