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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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compiler/rustc_hir/src/lang_items.rs
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@ -348,7 +348,4 @@ language_item_table! {
Range, sym::Range, range_struct, Target::Struct;
RangeToInclusive, sym::RangeToInclusive, range_to_inclusive_struct, Target::Struct;
RangeTo, sym::RangeTo, range_to_struct, Target::Struct;
Send, sym::send, send_trait, Target::Trait;
UnwindSafe, sym::unwind_safe, unwind_safe_trait, Target::Trait;
RefUnwindSafe, sym::ref_unwind_safe, ref_unwind_safe_trait, Target::Trait;
}