envolution [1] filed a deletion request for xz-git [2]:

This was originally submitted since core xz did not support parallel compression, that has been added to core - this package is not serving any purpose not covered by core

[1] https://aur.archlinux.org/account/envolution/ [2] https://aur.archlinux.org/pkgbase/xz-git/

This is a VCS pkgbuild and that's enough of a difference to keep it