Use diagnostic items instead of lang items for rfc2229 migrations This PR removes the `Send`, `UnwindSafe` and `RefUnwindSafe` lang items introduced in https://github.com/rust-lang/rust/pull/84730, and uses diagnostic items instead to check for `Send`, `UnwindSafe` and `RefUnwindSafe` traits for RFC2229 migrations. r? ```@nikomatsakis``` |
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| benches | ||
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| build.rs | ||
| Cargo.toml | ||