MarsSeed [1] filed a deletion request for zlib-static [2]: Abandoned package, duplicate of [extra] zlib.
Hasn't been updated since 2017. The [extra] repo version does carry the statically linked libz.a library as well. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/zlib-static/
