[PRQ#70058] Deletion Request for signal-back-git

MarsSeed [1] filed a deletion request for signal-back-git [2]: No longer works. [a] EOL for 7 years. [b] [a]: https://github.com/xeals/signal-back/issues [b]: https://github.com/xeals/signal-back [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/signal-back-git/