MarsSeed [1] filed a deletion request for libuhd-firmware3 [2]: Cleanup of unneeded legacy version released on 2020-01-01.
Was a companion of the long FTBFS AUR/libuhd3 (see deletion request PRQ#67397). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libuhd-firmware3/
