Drop some unused code

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 5c34b683d22c4d6d8f6a98780af32e2bbaee4e9d..29885b333999f44940416a1937f1575a2d5b6ca9 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -315,7 +315,6 @@ class HGraph FINAL : public ZoneObject {
   HEnvironment* start_environment() const { return start_environment_; }
 
   void FinalizeUniqueness();
-  bool ProcessArgumentsObject();
   void OrderBlocks();
   void AssignDominators();
   void RestoreActualValues();
@@ -479,8 +478,6 @@ class HGraph FINAL : public ZoneObject {
     phase.Run();
   }
 
-  void EliminateRedundantBoundsChecksUsingInductionVariables();
-
   Isolate* isolate_;
   int next_block_id_;
   HBasicBlock* entry_block_;
@@ -2204,7 +2201,6 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
   void VisitLogicalExpression(BinaryOperation* expr);
   void VisitArithmeticExpression(BinaryOperation* expr);
 
-  bool PreProcessOsrEntry(IterationStatement* statement);
   void VisitLoopBody(IterationStatement* stmt,
                      HBasicBlock* loop_entry);