llvm-project

694f1b42 - Remove GitHub Action seanmiddleditch/gha-setup-ninja (#194218)

Remove GitHub Action seanmiddleditch/gha-setup-ninja (#194218) From the GitHubAction [README](https://github.com/seanmiddleditch/gha-setup-ninja/blob/master/README.md): "This action is no longer necessary, as ninja is now included on all default GitHub runner instances."