[PRQ#68512] Deletion Request for mingw-w64-atk

MarsSeed [1] filed a deletion request for mingw-w64-atk [2]: EOL package from 2020. Upstream repo archived. [a] No longer required. Superseded by 'at-spi2-core' [b], which provides an updated version of this library. Both gtk2 and gtk3 should be built with that one. [a]: https://gitlab.gnome.org/GNOME/atk [b]: https://gitlab.gnome.org/GNOME/at-spi2-core [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mingw-w64-atk/