llvmbot monitor: Remove Buildkite support and libcxx bots

libcxx is no longer doing post-commit builds of the main branch.
Pre-commit builds continue but there's no need for us to monitor them,
folks will ping us if there are issues.

Change-Id: I063ec2a22b2c200da5d047bf80998ba4c884df68
5 files changed
tree: 4c8e9f4cdfc0e5949a427c885180ef21f19363c4
  1. bisect/
  2. helpers/
  3. monitor/
  4. release/
  5. stress/
  6. test-suite/
  7. .gitreview
  8. README.txt