[turbofan] Cleanup duplicated/unused code in InstructionSelector.

src/compiler/pipeline.cc

 // Copyright 2014 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/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 513 matching lines @@
     if (VerifyGraphs()) ScheduleVerifier::Run(schedule);
     data->set_schedule(schedule);
   }
 };
 
 
 struct InstructionSelectionPhase {
   static const char* phase_name() { return "select instructions"; }
 
   void Run(PipelineData* data, Zone* temp_zone, Linkage* linkage) {
-    InstructionSelector selector(temp_zone, data->graph(), linkage,
+    InstructionSelector selector(temp_zone, data->graph()->NodeCount(), linkage,
                                  data->sequence(), data->schedule(),
                                  data->source_positions());
     selector.SelectInstructions();
   }
 };
 
 
 struct MeetRegisterConstraintsPhase {
   static const char* phase_name() { return "meet register constraints"; }
 
@@ skipping 525 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8