Buildmaster cleaning/ removing long time off-line builders

Hello everyone,

I am going to remove builders/slaves which are off-line for a long time now:

clang-x64-ninja-win7
clang-x86_64-freebsd11
clang-x86_64-linux-selfhost-modules-2
openmp-clang-ppc64le-linux-debian
openmp-clang-ppc64le-linux-rhel

Please feel free to bring them back any time you need it.

Thanks

Galina