Can this wait a few days? I'd like to fix a few fallout before
This should be removed too.
Also GNOME_MTREE_FILE is present in Mk/Scripts/check-stagedir.sh and Mk/bsd.port.mk, so it probably needs to be axed from there too.
There is no more fallout so this can go in (with kwm's comment addressed)
Closed by commit rP375500 (authored by @bapt).