hir: remove NodeId from TypeBinding

Author: ljedrz

src/librustc/hir/lowering.rs

@@ -1151,10 +1151,9 @@ impl<'a> LoweringContext<'a> {
 
     fn lower_ty_binding(&mut self, b: &TypeBinding,
                         itctx: ImplTraitContext<'_>) -> hir::TypeBinding {
-        let LoweredNodeId { node_id, hir_id } = self.lower_node_id(b.id);
+        let LoweredNodeId { node_id: _, hir_id } = self.lower_node_id(b.id);
 
         hir::TypeBinding {
-            id: node_id,
             hir_id,
             ident: b.ident,
             ty: self.lower_ty(&b.ty, itctx),
@@ -1982,14 +1981,13 @@ impl<'a> LoweringContext<'a> {
                     let LoweredNodeId { node_id: _, hir_id } = this.next_id();
                     hir::Ty { node: hir::TyKind::Tup(tys), hir_id, span }
                 };
-                let LoweredNodeId { node_id, hir_id } = this.next_id();
+                let LoweredNodeId { node_id: _, hir_id } = this.next_id();
 
                 (
                     hir::GenericArgs {
                         args: hir_vec![GenericArg::Type(mk_tup(this, inputs, span))],
                         bindings: hir_vec![
                             hir::TypeBinding {
-                                id: node_id,
                                 hir_id,
                                 ident: Ident::from_str(FN_OUTPUT_NAME),
                                 ty: output
@@ -2326,13 +2324,12 @@ impl<'a> LoweringContext<'a> {
             };
 
             // "<Output = T>"
-            let LoweredNodeId { node_id, hir_id } = this.next_id();
+            let LoweredNodeId { node_id: _, hir_id } = this.next_id();
             let future_params = P(hir::GenericArgs {
                 args: hir_vec![],
                 bindings: hir_vec![hir::TypeBinding {
                     ident: Ident::from_str(FN_OUTPUT_NAME),
                     ty: output_ty,
-                    id: node_id,
                     hir_id,
                     span,
                 }],

src/librustc/hir/mod.rs

@@ -1737,7 +1737,6 @@ pub enum ImplItemKind {
 // Bind a type to an associated type: `A=Foo`.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct TypeBinding {
-    pub id: NodeId,
     pub hir_id: HirId,
     pub ident: Ident,
     pub ty: P<Ty>,

src/librustc/ich/impls_hir.rs

@@ -294,7 +294,6 @@ impl_stable_hash_for!(struct hir::MethodSig {
 });
 
 impl_stable_hash_for!(struct hir::TypeBinding {
-    id,
     hir_id,
     ident -> (ident.name),
     ty,