3 files changed, 0 insertions, 50 deletions
diff --git a/compiler/rustc_next_trait_solver/src/lib.rs b/compiler/rustc_next_trait_solver/src/lib.rs
index ca140500e2c..de74ac32804 100644
--- a/compiler/rustc_next_trait_solver/src/lib.rs
+++ b/compiler/rustc_next_trait_solver/src/lib.rs
@@ -12,6 +12,5 @@
 pub mod canonicalizer;
 pub mod coherence;
 pub mod delegate;
-pub mod relate;
 pub mod resolve;
 pub mod solve;
diff --git a/compiler/rustc_next_trait_solver/src/relate.rs b/compiler/rustc_next_trait_solver/src/relate.rs
deleted file mode 100644
index db819961bbd..00000000000
--- a/compiler/rustc_next_trait_solver/src/relate.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-pub use rustc_type_ir::relate::*;
-
-pub mod combine;
-
-/// Whether aliases should be related structurally or not. Used
-/// to adjust the behavior of generalization and combine.
-///
-/// This should always be `No` unless in a few special-cases when
-/// instantiating canonical responses and in the new solver. Each
-/// such case should have a comment explaining why it is used.
-#[derive(Debug, Copy, Clone)]
-pub enum StructurallyRelateAliases {
-    Yes,
-    No,
-}
diff --git a/compiler/rustc_next_trait_solver/src/relate/combine.rs b/compiler/rustc_next_trait_solver/src/relate/combine.rs
deleted file mode 100644
index 96968327d8e..00000000000
--- a/compiler/rustc_next_trait_solver/src/relate/combine.rs
+++ /dev/null
@@ -1,34 +0,0 @@
-pub use rustc_type_ir::relate::*;
-use rustc_type_ir::solve::Goal;
-use rustc_type_ir::{InferCtxtLike, Interner, Upcast};
-
-use super::StructurallyRelateAliases;
-
-pub trait PredicateEmittingRelation<Infcx, I = <Infcx as InferCtxtLike>::Interner>:
-    TypeRelation<I>
-where
-    Infcx: InferCtxtLike<Interner = I>,
-    I: Interner,
-{
-    fn span(&self) -> I::Span;
-
-    fn param_env(&self) -> I::ParamEnv;
-
-    /// Whether aliases should be related structurally. This is pretty much
-    /// always `No` unless you're equating in some specific locations of the
-    /// new solver. See the comments in these use-cases for more details.
-    fn structurally_relate_aliases(&self) -> StructurallyRelateAliases;
-
-    /// Register obligations that must hold in order for this relation to hold
-    fn register_goals(&mut self, obligations: impl IntoIterator<Item = Goal<I, I::Predicate>>);
-
-    /// Register predicates that must hold in order for this relation to hold.
-    /// This uses the default `param_env` of the obligation.
-    fn register_predicates(
-        &mut self,
-        obligations: impl IntoIterator<Item: Upcast<I, I::Predicate>>,
-    );
-
-    /// Register `AliasRelate` obligation(s) that both types must be related to each other.
-    fn register_alias_relate_predicate(&mut self, a: I::Ty, b: I::Ty);
-}