1 files changed, 1 insertions, 9 deletions
diff --git a/compiler/rustc_infer/src/traits/engine.rs b/compiler/rustc_infer/src/traits/engine.rs
index b2b985a22..d3519f4b3 100644
--- a/compiler/rustc_infer/src/traits/engine.rs
+++ b/compiler/rustc_infer/src/traits/engine.rs
@@ -8,14 +8,6 @@ use super::FulfillmentError;
 use super::{ObligationCause, PredicateObligation};
 
 pub trait TraitEngine<'tcx>: 'tcx {
-    fn normalize_projection_type(
-        &mut self,
-        infcx: &InferCtxt<'tcx>,
-        param_env: ty::ParamEnv<'tcx>,
-        projection_ty: ty::ProjectionTy<'tcx>,
-        cause: ObligationCause<'tcx>,
-    ) -> Ty<'tcx>;
-
     /// Requires that `ty` must implement the trait with `def_id` in
     /// the given environment. This trait must not have any type
     /// parameters (except for `Self`).
@@ -27,7 +19,7 @@ pub trait TraitEngine<'tcx>: 'tcx {
         def_id: DefId,
         cause: ObligationCause<'tcx>,
     ) {
-        let trait_ref = ty::TraitRef { def_id, substs: infcx.tcx.mk_substs_trait(ty, &[]) };
+        let trait_ref = infcx.tcx.mk_trait_ref(def_id, [ty]);
         self.register_predicate_obligation(
             infcx,
             Obligation {