From e31d75caeee35d4c026ec3beb56f6e5844eaf69e Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Thu, 7 Nov 2019 19:15:33 +0100
Subject: [PATCH] TAIT: remove redundant check from ast_validation

---
 src/librustc_passes/ast_validation.rs | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/librustc_passes/ast_validation.rs b/src/librustc_passes/ast_validation.rs
index ec5572914d8..bb0aa15efd0 100644
--- a/src/librustc_passes/ast_validation.rs
+++ b/src/librustc_passes/ast_validation.rs
@@ -20,7 +20,7 @@
 use syntax::symbol::{kw, sym};
 use syntax::visit::{self, Visitor};
 use syntax::{span_err, struct_span_err, walk_list};
-use syntax_pos::{Span, MultiSpan};
+use syntax_pos::Span;
 use errors::{Applicability, FatalError};
 
 struct AstValidator<'a> {
@@ -584,14 +584,6 @@ fn visit_item(&mut self, item: &'a Item) {
                                                 "unions cannot have zero fields");
                 }
             }
-            ItemKind::OpaqueTy(ref bounds, _) => {
-                if !bounds.iter()
-                          .any(|b| if let GenericBound::Trait(..) = *b { true } else { false }) {
-                    let msp = MultiSpan::from_spans(bounds.iter()
-                        .map(|bound| bound.span()).collect());
-                    self.err_handler().span_err(msp, "at least one trait must be specified");
-                }
-            }
             _ => {}
         }