Remove unneeded field from `SwitchTargets` This had a fixme already. The only change in behavior is that the mir dumps now no longer contains labels for the types of the integers on the edges of a switchint: Before:  After:  I don't think that's a problem though. The information is still available to a user that really cares by checking the type of `_2`, so it honestly feels like a bit of an improvement to me. r? mir
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.