removing the langsupport groups from F18+

[Bill Nottingham]

I've been working towards this for a while, and I think it's
ready to go - I'd like to remove the langsupport groups from
F18+.

This is because:
- we're not intending to expose them directly in anaconda
- we now have yum-langpacks for translations

For fonts, we have the @fonts group, and for input methods,
we have the @input-methods group. An install of either of
those groups brings the proper default fonts & input methods
for every language we ship, AFAICT.

What issues are there that might prevent removal?

Bill