Revert "Allow running back-deployment testing against libc++abi"

This reverts commit 4d79ef814aedb63, which broke a few build bots.
I'm reverting until I have time to investigate.

GitOrigin-RevId: c1887e3f15aeac7037b88b066b33d142c6bb1321
2 files changed
tree: 325014a63a7a733b4db597d5a4de8e2c4ca2cf72
  1. .clang-format
  2. CMakeLists.txt
  3. LICENSE.TXT
  4. cmake/
  5. docs/
  6. include/
  7. src/
  8. test/