[llvm] Revert "[BasicBlockUtils] Handle funclets when detaching EH pad blocks" (PR #158364)

[Gábor Spaits via llvm-commits]

spaits wrote:

Hi @aeubanks . I am checking the issue. Please wait a bit with the revert. If I can't do it in a few hours, I will approve this and merge this.

If I can fix it fast have would rather commit that, than reland the whole patch again.

https://github.com/llvm/llvm-project/pull/158364