Small cleanups in the Kernel FlowGraphBuilder

runtime/vm/kernel.cc

 // 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.
 
 #include "vm/kernel.h"
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 namespace dart {
 
 namespace kernel {
@@ skipping 734 matching lines @@
   visitor->VisitLet(this);
 }
 
 
 void Let::VisitChildren(Visitor* visitor) {
   visitor->VisitVariableDeclaration(variable());
   body()->AcceptExpressionVisitor(visitor);
 }
 
 
-BlockExpression::~BlockExpression() {}
-
-
-void BlockExpression::AcceptExpressionVisitor(ExpressionVisitor* visitor) {
-  visitor->VisitBlockExpression(this);
-}
-
-
-void BlockExpression::VisitChildren(Visitor* visitor) {
-  visitor->VisitBlock(body());
-  value()->AcceptExpressionVisitor(visitor);
-}
-
-
 Statement::~Statement() {}
 
 
 void Statement::AcceptTreeVisitor(TreeVisitor* visitor) {
   AcceptStatementVisitor(visitor);
 }
 
 
 InvalidStatement::~InvalidStatement() {}
 
@@ skipping 423 matching lines @@
 void Program::VisitChildren(Visitor* visitor) {
   VisitList(&libraries(), visitor);
   visitor->VisitProcedureReference(main_method());
 }
 
 
 }  // namespace kernel
 
 }  // namespace dart
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)