[sanddune]: cleanup

Change-Id: I668ddf144f85ddc9a23f0eb62e3ac907550accb8
Reviewed-on: https://chromium-review.googlesource.com/c/infra/sanddune/+/4602411
Reviewed-by: Camilo Jacomet <cjacomet@google.com>
Auto-Submit: Yulan Lin <yulanlin@google.com>
2572 files changed
tree: e127d4452cc6285fc3af36fb832492c477bda324
  1. .buildkite/
  2. .github/
  3. .bazelrc
  4. .gitignore
  5. .travis.yml