[llvm] [NewPM] Remove LowerWidenableConditionLegacyPass (PR #72818)

[Nikita Popov via llvm-commits]

nikic wrote:

> Can you clarify what you mean here? Are you referring to adjusting `PassRegistry.def` to switch the `print-*` names to `print<*>` names?
> 
> And then the plan right now would be to keep the legacy versions of all these utility passes? Or should we look at removing them too?

Ah, if these already have NewPM variants, we should remove the legacy PM ones. I thought that some of the printing passes hadn't been ported to NewPM yet.

https://github.com/llvm/llvm-project/pull/72818