[LLVMdev] Will remove two llvm-gcc cross builders

[Galina Kistanova]

Hello everyone,

I am going to remove these two existing llvm-gcc cross builders:

http://google1.osuosl.org:8011/builders/llvm-gcc-x86_64-darwin10-self-mingw32
http://google1.osuosl.org:8011/builders/llvm-gcc-x86_64-darwin10-cross-mingw32

These configurations gets built as parts of the build
build-self-4-mingw32 does, so we don't loose anything just getting the
same result a bit slower, which should be fine I hope.

Thanks

Galina