[libc-commits] [libc] [libc] Enable `-Wunused` and clean up found instances (PR #96949)

[Rajveer Singh Bharadwaj via libc-commits]

Rajveer100 wrote:

Well, I think I am probably not checking the right way, I did see some warnings show up when doing `ninja -C build check-all`.

How would you do it @SchrodingerZhu ?

https://github.com/llvm/llvm-project/pull/96949