[clang] [clang-format] Remove YAML hack to emit a BasedOnStyle comment (PR #89228)

[Björn Schäpers via cfe-commits]

https://github.com/HazardyKnusperkeks approved this pull request.

I don't see a use case for that comment, and thus I see no problem in removing it.

https://github.com/llvm/llvm-project/pull/89228