[libunwind] Revert "Silence -Wunused-parameter warnings in Unwind-wasm.c" (PR #175776)

[Fangrui Song via cfe-commits]

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

Looks good, if idionne is happy.



> Eliding arguments is the C23 extension, but libunwind builds its C files with -std=c99, so this change broke the build.

Does it break the build with very new clang? If yes, please include the information.

While I've read comments on #125412, it isn't clear to me why the change, merged on on Feb 17, 2025, was noticed only recently.

https://github.com/llvm/llvm-project/pull/175776