[clang] [clang][deps] Don't treat ObjC method args as module directives (PR #97654)

[Chuanqi Xu via cfe-commits]

https://github.com/ChuanqiXu9 approved this pull request.

LGTM as it looks like not affecting C++20 modules.

https://github.com/llvm/llvm-project/pull/97654