[r260944] clang-tools-extra/test/Unit/lit.site.cfg.in: Prune on_clone. I guess it has been unused since r188006.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/branches/release_38@271354 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed