Revert "Add a test for __block variables + asan."

This reverts commit r300228.

It's causing failures on a bot because of missing compiler-rt:
http://green.lab.llvm.org/green/job/clang-stage2-cmake-RgSan_check

llvm-svn: 300458
GitOrigin-RevId: 559d04d4c3574afabb913c18ee666c920876b45e
2 files changed