MarsSeed [1] filed a deletion request for mingw-w64-wxmsw3.1 [2]: Unused legacy version wxwidgets package from 2021.
Only AUR/mingw-w64-wxmsw has a dependent (one a the moment). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mingw-w64-wxmsw3.1/
