[PRQ#49845] Deletion Request for lib32-svt-av1

MarsSeed [1] filed a deletion request for lib32-svt-av1 [2]: Same reason as written in the deletion request for lib32-libheif (PRQ#49840), with the exception that this had its first git tag in 2019, whereas for the latter, it was in 2018. This should be dropped from AUR for lack of any use case whatsoever. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/lib32-svt-av1/