hir: remove NodeId from WhereEqPredicate

Author: ljedrz

src/librustc/hir/lowering.rs

@@ -2661,10 +2661,9 @@ impl<'a> LoweringContext<'a> {
                 ref rhs_ty,
                 span,
             }) => {
-                let LoweredNodeId { node_id, hir_id } = self.lower_node_id(id);
+                let LoweredNodeId { node_id: _, hir_id } = self.lower_node_id(id);
 
                 hir::WherePredicate::EqPredicate(hir::WhereEqPredicate {
-                    id: node_id,
                     hir_id,
                     lhs_ty: self.lower_ty(lhs_ty, ImplTraitContext::disallowed()),
                     rhs_ty: self.lower_ty(rhs_ty, ImplTraitContext::disallowed()),

src/librustc/hir/mod.rs

@@ -687,7 +687,6 @@ pub struct WhereRegionPredicate {
 /// An equality predicate (e.g., `T = int`); currently unsupported.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct WhereEqPredicate {
-    pub id: NodeId,
     pub hir_id: HirId,
     pub span: Span,
     pub lhs_ty: P<Ty>,

src/librustc/ich/impls_hir.rs

@@ -277,7 +277,6 @@ impl_stable_hash_for!(struct hir::WhereRegionPredicate {
 });
 
 impl_stable_hash_for!(struct hir::WhereEqPredicate {
-    id,
     hir_id,
     span,
     lhs_ty,