Revert "[test] Add tests for llc passes pipelines."

This reverts r328159 because the two AArch64 tests fail on GreenDragon:
http://green.lab.llvm.org/green/job/clang-stage1-cmake-RA-expensive/11030/

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328188 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed