[XRay] Remove unnecessary <x86intrin.h> include

It hasn't been necessary since commit 4d4ed0e288bf1f3a90fba6e5b56bc25e2fe961c3 (D43278).

Reviewed By: dberris

Differential Revision: https://reviews.llvm.org/D93196

GitOrigin-RevId: 55f07a340070ebfb53eef68a624956d11936b1fe
1 file changed