Remove dead data structure in Scheduler.

src/compiler/scheduler.h

 // Copyright 2013 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.
 
 #ifndef V8_COMPILER_SCHEDULER_H_
 #define V8_COMPILER_SCHEDULER_H_
 
 #include <vector>
 
 #include "src/v8.h"
@@ skipping 19 matching lines @@
 
  private:
   Zone* zone_;
   Graph* graph_;
   Schedule* schedule_;
   NodeVector branches_;
   NodeVector calls_;
   NodeVector deopts_;
   NodeVector returns_;
   NodeVector loops_and_merges_;
-  BasicBlockVector node_block_placement_;
   IntVector unscheduled_uses_;
   NodeVectorVector scheduled_nodes_;
   NodeVector schedule_root_nodes_;
   IntVector schedule_early_rpo_index_;
 
   Scheduler(Zone* zone, Graph* graph, Schedule* schedule);
 
   int GetRPONumber(BasicBlock* block) {
     DCHECK(block->rpo_number_ >= 0 &&
            block->rpo_number_ < static_cast<int>(schedule_->rpo_order_.size()));
@@ skipping 25 matching lines @@
   void PrepareUses();
 
   friend class ScheduleLateNodeVisitor;
   void ScheduleLate();
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_SCHEDULER_H_