Remove the HValueOf instruction.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 0e33c82cb482bc2b357b6fe1e9772dd28e98ab18..d599ab089afe5827ffdf34f5558be8b80bbeb8ba 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -181,7 +181,6 @@ class LChunkBuilder;
   V(UnaryMathOperation)                        \
   V(UnknownOSRValue)                           \
   V(UseConst)                                  \
-  V(ValueOf)                                   \
   V(WrapReceiver)
 
 #define GVN_TRACKED_FLAG_LIST(V)               \
@@ -7205,25 +7204,6 @@ class HToFastProperties V8_FINAL : public HUnaryOperation {
 };
 
 
-class HValueOf V8_FINAL : public HUnaryOperation {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P1(HValueOf, HValue*);
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(ValueOf)
-
- private:
-  explicit HValueOf(HValue* value) : HUnaryOperation(value) {
-    set_representation(Representation::Tagged());
-  }
-
-  virtual bool IsDeletable() const V8_OVERRIDE { return true; }
-};
-
-
 class HDateField V8_FINAL : public HUnaryOperation {
  public:
   DECLARE_INSTRUCTION_FACTORY_P2(HDateField, HValue*, Smi*);