[llvm] [ProfCheck] Remove Function argument from branch weight setter (NFC). (PR #166028)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

> Unfortunately looks like this doesn't work for InstCombine

We could make `F` a pointer, move it as the 3rd arg, and have it have a default value. I'll prep a patch.

https://github.com/llvm/llvm-project/pull/166028