Commit b2b4b38433bf2d1159360855ea4004378308711b (2017-10-02)

Remove toolchain configs in deprecated locations.

URLs (to be added to your WORKSPACE file):

• http://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/archive/b2b4b38433bf2d1159360855ea4004378308711b.tar.gz
• https://github.com/bazelbuild/bazel-toolchains/archive/b2b4b38433bf2d1159360855ea4004378308711b.tar.gz

SHA256: 46187270ca04ff8109980f45c3438fabfe48695e163789096eb82ee097ffe685