[Kernel] Remove code from the old type propagation.

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 238 matching lines @@
   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);
 
-  /// Inferred values
-  R visitInferredValue(InferredValue 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);
@@ skipping 156 matching lines @@
       defaultStatement(node, arg);
   R visitTryCatch(TryCatch node, arg) => defaultStatement(node, arg);
   R visitTryFinally(TryFinally node, arg) => defaultStatement(node, arg);
   R visitYieldStatement(YieldStatement node, arg) =>
       defaultStatement(node, arg);
   R visitVariableDeclaration(VariableDeclaration node, arg) =>
       defaultStatement(node, arg);
   R visitFunctionDeclaration(FunctionDeclaration node, arg) =>
       defaultStatement(node, arg);
 }