[libc-commits] [libc] [libc][NFC] Tighten up guard conditions for sqrt and polyeval (PR #93791)

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lntue wrote:

> @lntue I can't find where `libc/src/__support/FPUtil/x86_64/PolyEval.h` is included.

it's actually not used currently.  You can remove the file.

https://github.com/llvm/llvm-project/pull/93791