3 files changed, 5 insertions, 27 deletions
diff --git a/compiler/rustc_middle/src/ty/error.rs b/compiler/rustc_middle/src/ty/error.rs
index b02eff3bfd6..c49824bb418 100644
--- a/compiler/rustc_middle/src/ty/error.rs
+++ b/compiler/rustc_middle/src/ty/error.rs
@@ -35,9 +35,6 @@ impl<'tcx> TypeError<'tcx> {
             TypeError::CyclicTy(_) => "cyclic type of infinite size".into(),
             TypeError::CyclicConst(_) => "encountered a self-referencing constant".into(),
             TypeError::Mismatch => "types differ".into(),
-            TypeError::ConstnessMismatch(values) => {
-                format!("expected {} bound, found {} bound", values.expected, values.found).into()
-            }
             TypeError::PolarityMismatch(values) => {
                 format!("expected {} polarity, found {} polarity", values.expected, values.found)
                     .into()
diff --git a/compiler/rustc_middle/src/ty/relate.rs b/compiler/rustc_middle/src/ty/relate.rs
index 4c7bcb1bf2e..504a3c8a6d8 100644
--- a/compiler/rustc_middle/src/ty/relate.rs
+++ b/compiler/rustc_middle/src/ty/relate.rs
@@ -1,7 +1,5 @@
 use std::iter;
 
-use rustc_hir as hir;
-use rustc_target::spec::abi;
 pub use rustc_type_ir::relate::*;
 
 use crate::ty::error::{ExpectedFound, TypeError};
@@ -121,26 +119,6 @@ impl<'tcx> Relate<TyCtxt<'tcx>> for &'tcx ty::List<ty::PolyExistentialPredicate<
     }
 }
 
-impl<'tcx> Relate<TyCtxt<'tcx>> for hir::Safety {
-    fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
-        _relation: &mut R,
-        a: hir::Safety,
-        b: hir::Safety,
-    ) -> RelateResult<'tcx, hir::Safety> {
-        if a != b { Err(TypeError::SafetyMismatch(ExpectedFound::new(true, a, b))) } else { Ok(a) }
-    }
-}
-
-impl<'tcx> Relate<TyCtxt<'tcx>> for abi::Abi {
-    fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
-        _relation: &mut R,
-        a: abi::Abi,
-        b: abi::Abi,
-    ) -> RelateResult<'tcx, abi::Abi> {
-        if a == b { Ok(a) } else { Err(TypeError::AbiMismatch(ExpectedFound::new(true, a, b))) }
-    }
-}
-
 impl<'tcx> Relate<TyCtxt<'tcx>> for ty::GenericArgsRef<'tcx> {
     fn relate<R: TypeRelation<TyCtxt<'tcx>>>(
         relation: &mut R,
diff --git a/compiler/rustc_middle/src/ty/structural_impls.rs b/compiler/rustc_middle/src/ty/structural_impls.rs
index cd9ff9b60d8..4872d8c89eb 100644
--- a/compiler/rustc_middle/src/ty/structural_impls.rs
+++ b/compiler/rustc_middle/src/ty/structural_impls.rs
@@ -264,8 +264,6 @@ TrivialTypeTraversalImpls! {
 // interners).
 TrivialTypeTraversalAndLiftImpls! {
     ::rustc_hir::def_id::DefId,
-    ::rustc_hir::Safety,
-    ::rustc_target::spec::abi::Abi,
     crate::ty::ClosureKind,
     crate::ty::ParamConst,
     crate::ty::ParamTy,
@@ -276,6 +274,11 @@ TrivialTypeTraversalAndLiftImpls! {
     rustc_target::abi::Size,
 }
 
+TrivialLiftImpls! {
+    ::rustc_hir::Safety,
+    ::rustc_target::spec::abi::Abi,
+}
+
 ///////////////////////////////////////////////////////////////////////////
 // Lift implementations