reducing the goffice/gnumeric delta with debian

[Gauvain Pocentek]

Hello,

After a discussion with the Xubuntu team, I believe it's probably time
to get rid of the goffice and gnumeric multibuilds, which are now
useless (Xubuntu already ships the additional dependencies brought by
the gnome variant).

I'll push new packages to reduce the delta and drop the gtk variant
soon, but I'd like to hear people who might need to keep the multibuild
(derivative devs, or people willing to keep merging the packages).

Thanks,
Gauvain