Remove the unused HElementsKind instruction.

src/ia32/lithium-ia32.h

Index: src/ia32/lithium-ia32.h
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index a0b750f5c4eb7432226bd74426a61caee7f29c0d..e8a1e0b45a66ae1ffb3d8fc3e9a4271c812b1c18 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -93,7 +93,6 @@ class LCodeGen;
   V(Drop)                                       \
   V(Dummy)                                      \
   V(DummyUse)                                   \
-  V(ElementsKind)                               \
   V(ForInCacheArray)                            \
   V(ForInPrepareMap)                            \
   V(FunctionLiteral)                            \
@@ -1268,19 +1267,6 @@ class LMapEnumLength V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LElementsKind V8_FINAL : public LTemplateInstruction<1, 1, 0> {
- public:
-  explicit LElementsKind(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
-  DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
-};
-
-
 class LValueOf V8_FINAL : public LTemplateInstruction<1, 1, 1> {
  public:
   LValueOf(LOperand* value, LOperand* temp) {