[clang] [llvm] [X86][APX] Remove CF feature from APXF and Diamond Rapids (PR #153751)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

> Update description?
> 
> Due to it results in more losses than gains. -> Due to it results in more losses than gains w/o HWPGO.

I assume HWPGO is not mature enough.

https://github.com/llvm/llvm-project/pull/153751