Make unify private again

Author: adamrk

crates/hir_ty/src/infer.rs

@@ -55,7 +55,7 @@ macro_rules! ty_app {
     };
 }
 
-pub mod unify;
+mod unify;
 mod path;
 mod expr;
 mod pat;

crates/hir_ty/src/lib.rs

@@ -43,7 +43,7 @@ use crate::{
 };
 
 pub use autoderef::autoderef;
-pub use infer::{unify, InferTy, InferenceResult};
+pub use infer::{InferTy, InferenceResult};
 pub use lower::CallableDefId;
 pub use lower::{
     associated_type_shorthand_candidates, callable_item_sig, ImplTraitLoweringMode, TyDefId,