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Rollup merge of #160747 - mejrs:unused_impls, r=GuillaumeGomez,JonathanBrouwer

rustc_errors: remove unused code

r? @GuillaumeGomez
J
Jonathan Brouwer committed
8e0aaa48587c902572772ffd17d5fe7980550b92
Committed by GitHub <noreply@github.com> on 8/8/2026, 2:32:49 PM