[llvm] [AMDGPU] Remove GCNRewritePartialRegUsesImpl::getOperandRegClass (PR #135153)

[Valery Pykhtin via llvm-commits]

vpykhtin wrote:

Thanks Jay, this reminds me that I have a cleanup patch for this pass that removes some leftover hacks existed before https://github.com/llvm/llvm-project/pull/67245. I don't mind submitting this but I would like to take a look into my patch and remember what I did.

https://github.com/llvm/llvm-project/pull/135153