[PRQ#41779] Deletion Request for obs-v4l2sink

Tabsc [1] filed a deletion request for obs-v4l2sink [2]: Apparently this package is not needed since version 26.1 of OBS. Current arclinux version is 29.1.1. Given that their is no more maintainers it is probably worth deleting it. See [upstream](https://github.com/CatxFish/obs-v4l2sink) [1] https://aur.archlinux.org/account/Tabsc/ [2] https://aur.archlinux.org/pkgbase/obs-v4l2sink/