[llvm] [InstCombine] Remove redundant fptrunc of select fold (NFCI) (PR #117182)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

I think this LGTM, except maybe change NFCI to NFC in the title? I also looked at the subsuming commit, and I think we can be confident that this is an NFC.

https://github.com/llvm/llvm-project/pull/117182