Remove dead TargetCollector code from the parser

src/ast.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 399 matching lines @@
     return AsArrayLiteral()->BuildConstantElements(isolate);
   }
   if (IsObjectLiteral()) {
     return AsObjectLiteral()->BuildConstantProperties(isolate);
   }
   DCHECK(IsRegExpLiteral());
   DCHECK(depth() >= 1);  // Depth should be initialized.
 }
 
 
-void TargetCollector::AddTarget(Label* target, Zone* zone) {
-  // Add the label to the collector, but discard duplicates.
-  int length = targets_.length();
-  for (int i = 0; i < length; i++) {
-    if (targets_[i] == target) return;
-  }
-  targets_.Add(target, zone);
-}
-
-
 void UnaryOperation::RecordToBooleanTypeFeedback(TypeFeedbackOracle* oracle) {
   // TODO(olivf) If this Operation is used in a test context, then the
   // expression has a ToBoolean stub and we want to collect the type
   // information. However the GraphBuilder expects it to be on the instruction
   // corresponding to the TestContext, therefore we have to store it here and
   // not on the operand.
   set_to_boolean_types(oracle->ToBooleanTypes(expression()->test_id()));
 }
 
 
@@ skipping 586 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 } }  // namespace v8::internal