From 32c488f045fb9fe0fc45c6dacb9938ebc6767598 Mon Sep 17 00:00:00 2001
From: Bastian Kauschke <bastian_kauschke@hotmail.de>
Date: Sat, 6 Jun 2020 15:54:07 +0200
Subject: [PATCH] remove outdated comment

---
 src/librustc_middle/ty/sty.rs | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/librustc_middle/ty/sty.rs b/src/librustc_middle/ty/sty.rs
index f4962ced6c03a..32a685297122b 100644
--- a/src/librustc_middle/ty/sty.rs
+++ b/src/librustc_middle/ty/sty.rs
@@ -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> {