remove gtetrinet, mdbtools, grhino, gbrainy

Hi.

I would like to start removing old and unmaintained gnome2 libs.
Any objection to drop the following;?

devel/ORBit2
x11/gnome/libbonobo
x11/gnome/libgnome
games/gtetrinet
x11/gnome/libbonoboui
x11/gnome/libgnomeui
databases/mdbtools
games/grhino
x11/gnome/mono-gnome
games/gbrainy


--
Antoine