[PRQ#57541] Deletion Request for mingw-w64-gtkmm3

[notify]

MarsSeed [1] filed a deletion request for mingw-w64-gtkmm3 [2]:

Broken legacy bindings, but no longer needed by any build.

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/mingw-w64-gtkmm3/