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Rollup merge of #86726 - sexxi-goose:use-diagnostic-item-for-rfc2229-migration, r=nikomatsakis

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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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Guillaume Gomez 2021-07-08 18:30:33 +02:00 • committed by GitHub
commit d12b16887b
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7 changed files with 14 additions and 20 deletions
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3
compiler/rustc_passes/src/lang_items.rs
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@ -257,9 +257,6 @@ impl LanguageItemCollector<'tcx> {
| LangItem::Unpin
| LangItem::Termination
| LangItem::Try
| LangItem::Send
| LangItem::UnwindSafe
| LangItem::RefUnwindSafe
=> Some(0),
// Not a trait