[PRQ#49818] Deletion Request for zlib-zpipe

MarsSeed [1] filed a deletion request for zlib-zpipe [2]: Cleanup of this unneeded pkg after the deletion of pngzop (reasons in PRQ#49629). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/zlib-zpipe/