[WebAssembly] Clean up CustomMappingTraits<BBNumberMap> (NFC)#167155

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_20251108_clang_tidy_readability-redundant-string-cstr_WebAssemblykazutakahirata/llvm-project:cleanup_20251108_clang_tidy_readability-redundant-string-cstr_WebAssemblyCopy head branch name to clipboard