[llvm-branch-commits] [GlobalISel] Don't remove from unfinalized GISelWorkList (PR #102158)

[Tobias Stadler via llvm-branch-commits]

https://github.com/tobias-stadler created https://github.com/llvm/llvm-project/pull/102158

Remove a hack from GISelWorkList caused by the Combiner removing
instructions from an unfinalized GISelWorkList during the DCE phase.
This is in preparation for larger changes to the WorkListMaintainer.