Removed everything to mark this repo as obsolete.

http://lists.opensuse.org/libyui-devel/2013-10/msg00004.html

"libyui-buildtools was meant to be shared between the different libyui
components. While improving the build environment it was moved to
libyui. Thus, libyui-buildtools is obsolete now."
Merge pull request #6 from mvidner/master

Removed everything to mark this repo as obsolete.