[llvm] [MachineVerifier] Allow KILL MI with dangling MMO in MachineVerifier. (PR #114407)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> An optimization pass may change an instruction into a KILL it seems when there is no use for the produced value. In this case the register coalescer did so while leaving the MMO untouched. The MachineVerifier did not accept this, but it seems reasonable that it should.


It should just delete the memory operands. There's no reason to accept this 

https://github.com/llvm/llvm-project/pull/114407