[PRQ#50215] Deletion Request for heif

MarsSeed [1] filed a deletion request for heif [2]: Unused, defunct older implementation of libheif by nokiatech, project unmaintained since 2021. [a] Has breaking issues that are not fixed. [b] Extra repo carries the libheif implementation that's working and which is used by other builds. [a]: https://github.com/nokiatech/heif [b]: https://github.com/nokiatech/heif/issues [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/heif/