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Rollup merge of #73059 - lcnr:outdated-comment, r=matthewjasper

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remove outdated comment

r? @matthewjasper
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Dylan DPC 2020-06-07 02:29:02 +02:00 committed by GitHub
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src/librustc_middle/ty/sty.rs
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@ -724,10 +724,6 @@ impl<'tcx> Binder<&'tcx List<ExistentialPredicate<'tcx>>> {
///
/// Trait references also appear in object types like `Foo<U>`, but in
/// that case the `Self` parameter is absent from the substitutions.
///
/// Note that a `TraitRef` introduces a level of region binding, to
/// account for higher-ranked trait bounds like `T: for<'a> Foo<&'a U>`
/// or higher-ranked object types.
#[derive(Copy, Clone, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
#[derive(HashStable, TypeFoldable)]
pub struct TraitRef<'tcx> {