[PRQ#66379] Deletion Request for qmarkdown

MarsSeed [1] filed a deletion request for qmarkdown [2]: Cannot be built, as mentioned by users since June 2022. AUR submitter is upstream but does not seem to care. Last release was 3 years ago. [a] The upstream GitHub repo's master and dev branches have several meaningful updates (e.g. better Qt6 compatibility, and other enhancements). I think it's better for users to only keep the working AUR/qmarkdown- git. [b] [a]: https://github.com/Peterwmoss/qmarkdown/tags [b]: https://aur.archlinux.org/packages/qmarkdown-git [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/qmarkdown/