[turbofan] Cleanup duplicated/unused code in InstructionSelector.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index d7dafb6608b538af676bb2f01cef82772d6d7a67..9aca0a6da2395b40cb91846db783fccba4a8b20e 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -531,7 +531,7 @@ 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();