[PRQ#49309] Deletion Request for qt5-jsonserializer

MarsSeed [1] filed a deletion request for qt5-jsonserializer [2]: Unused, discontinued library from 2019; upstream GitHub repo is now archived. [a] [a]: https://github.com/Skycoder42/QtJsonSerializer [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/qt5-jsonserializer/