Revert "Add typedef AST node boilerplate."

pkg/kernel/lib/visitor.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library kernel.ast.visitor;
 
 import 'ast.dart';
 
 abstract class ExpressionVisitor<R> {
   R defaultExpression(Expression node) => null;
   R defaultBasicLiteral(BasicLiteral node) => defaultExpression(node);
@@ skipping 203 matching lines @@
       defaultInitializer(node);
   R visitFieldInitializer(FieldInitializer node) => defaultInitializer(node);
   R visitSuperInitializer(SuperInitializer node) => defaultInitializer(node);
   R visitRedirectingInitializer(RedirectingInitializer node) =>
       defaultInitializer(node);
   R visitLocalInitializer(LocalInitializer node) => defaultInitializer(node);
 
   // Other tree nodes
   R visitLibrary(Library node) => defaultTreeNode(node);
   R visitDeferredImport(DeferredImport node) => defaultTreeNode(node);
-  R visitTypedef(Typedef node) => defaultTreeNode(node);
   R visitTypeParameter(TypeParameter node) => defaultTreeNode(node);
   R visitFunctionNode(FunctionNode node) => defaultTreeNode(node);
   R visitArguments(Arguments node) => defaultTreeNode(node);
   R visitNamedExpression(NamedExpression node) => defaultTreeNode(node);
   R visitSwitchCase(SwitchCase node) => defaultTreeNode(node);
   R visitCatch(Catch node) => defaultTreeNode(node);
   R visitMapEntry(MapEntry node) => defaultTreeNode(node);
   R visitProgram(Program node) => defaultTreeNode(node);
 }
 
 class DartTypeVisitor<R> {
   R defaultDartType(DartType node) => null;
 
   R visitInvalidType(InvalidType node) => defaultDartType(node);
   R visitDynamicType(DynamicType node) => defaultDartType(node);
   R visitVoidType(VoidType node) => defaultDartType(node);
   R visitBottomType(BottomType node) => defaultDartType(node);
   R visitInterfaceType(InterfaceType node) => defaultDartType(node);
   R visitVectorType(VectorType node) => defaultDartType(node);
   R visitFunctionType(FunctionType node) => defaultDartType(node);
   R visitTypeParameterType(TypeParameterType node) => defaultDartType(node);
-  R visitTypedefType(TypedefType node) => defaultDartType(node);
 }
 
 class MemberReferenceVisitor<R> {
   R defaultMemberReference(Member node) => null;
 
   R visitFieldReference(Field node) => defaultMemberReference(node);
   R visitConstructorReference(Constructor node) => defaultMemberReference(node);
   R visitProcedureReference(Procedure node) => defaultMemberReference(node);
 }
 
 class Visitor<R> extends TreeVisitor<R>
     implements DartTypeVisitor<R>, MemberReferenceVisitor<R> {
   /// The catch-all case, except for references.
   R defaultNode(Node node) => null;
   R defaultTreeNode(TreeNode node) => defaultNode(node);
 
   // DartTypes
   R defaultDartType(DartType node) => defaultNode(node);
   R visitInvalidType(InvalidType node) => defaultDartType(node);
   R visitDynamicType(DynamicType node) => defaultDartType(node);
   R visitVoidType(VoidType node) => defaultDartType(node);
   R visitBottomType(BottomType node) => defaultDartType(node);
   R visitInterfaceType(InterfaceType node) => defaultDartType(node);
   R visitVectorType(VectorType node) => defaultDartType(node);
   R visitFunctionType(FunctionType node) => defaultDartType(node);
   R visitTypeParameterType(TypeParameterType node) => defaultDartType(node);
-  R visitTypedefType(TypedefType node) => defaultDartType(node);
 
   // Class references
   R visitClassReference(Class node) => null;
-  R visitTypedefReference(Typedef node) => null;
 
   // Member references
   R defaultMemberReference(Member node) => null;
   R visitFieldReference(Field node) => defaultMemberReference(node);
   R visitConstructorReference(Constructor node) => defaultMemberReference(node);
   R visitProcedureReference(Procedure node) => defaultMemberReference(node);
 
   R visitName(Name node) => defaultNode(node);
   R visitSupertype(Supertype node) => defaultNode(node);
   R visitNamedType(NamedType node) => defaultNode(node);
@@ skipping 147 matching lines @@
       defaultStatement(node, arg);
   R visitTryCatch(TryCatch node, T arg) => defaultStatement(node, arg);
   R visitTryFinally(TryFinally node, T arg) => defaultStatement(node, arg);
   R visitYieldStatement(YieldStatement node, T arg) =>
       defaultStatement(node, arg);
   R visitVariableDeclaration(VariableDeclaration node, T arg) =>
       defaultStatement(node, arg);
   R visitFunctionDeclaration(FunctionDeclaration node, T arg) =>
       defaultStatement(node, arg);
 }