dreieck [1] filed a deletion request for icu74 [2]: Now version 74 has made it to the Artix repositories. No need for this package right now; but might be useful as a legacy version later on when official version has moved on.
[1] https://aur.archlinux.org/account/dreieck/ [2] https://aur.archlinux.org/pkgbase/icu74/
