Remove dead code.

dart/lib/compiler/implementation/ssa/nodes.dart

 // Copyright (c) 2011, 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.
 
 interface HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
   R visitBitOr(HBitOr node);
   R visitBitXor(HBitXor node);
@@ skipping 1152 matching lines @@
 
   HType computeDesiredTypeForInput(HInstruction input) {
     // TODO(floitsch): we want the target to be a function.
     if (input == target) return HType.UNKNOWN;
     return computeDesiredTypeForNonTargetInput(input);
   }
 
   HType computeDesiredTypeForNonTargetInput(HInstruction input) {
     return HType.UNKNOWN;
   }
-
-  bool get builtin() => isArrayConstructor();
 }
 
 class HInvokeSuper extends HInvokeStatic {
   HInvokeSuper(selector, inputs) : super(selector, inputs);
   toString() => 'invoke super: ${element.name}';
   accept(HVisitor visitor) => visitor.visitInvokeSuper(this);
 }
 
 class HInvokeInterceptor extends HInvokeStatic {
   final SourceString name;
@@ skipping 1112 matching lines @@
   final bool isAnd;
   final SubExpression left;
   final SubExpression right;
   final HBasicBlock joinBlock;
   HAndOrBlockInformation(this.isAnd,
                          this.left,
                          this.right,
                          this.joinBlock);
   bool accept(HBlockInformationVisitor visitor) => visitor.visitAndOrInfo(this);
 }