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Remove structural match from `TypeId` As per https://github.com/rust-lang/rust/pull/99189#issuecomment-1203720442. > Removing the structural equality might make sense, but is a breaking change that'd require a libs-api FCP. https://github.com/rust-lang/rust/pull/99189#issuecomment-1197545482 > Landing this PR now (well, mainly the "remove structural equality" part) would unblock `const fn` `TypeId::of`, since we only postponed that because we were guaranteeing too much. See also #99189, #101698