mir-opt: Remove the workaround in UnreachableEnumBranching#146544

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dianqk wants to merge 2 commits intorust-lang:mainfrom

dianqk:rm-workaround

Commits on Jan 23, 2026

Revert "Remove restrictions on small enum statements such as `Order`, `Option` or `Result`"
dianqk
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Revert "Add a workaround for the `TailDuplicator` compile time overhead"
dianqk
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