[runtime] Remove the redundant %_IsObject intrinsic.

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 2a5639f8e4c6d95f2cf31f3c2018635238498c11..04634a3236c9a8b98b5b7206899c6bf80b91fe09 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -95,7 +95,6 @@ class LCodeGen;
   V(Integer32ToDouble)                       \
   V(InvokeFunction)                          \
   V(IsConstructCallAndBranch)                \
-  V(IsObjectAndBranch)                       \
   V(IsStringAndBranch)                       \
   V(IsSmiAndBranch)                          \
   V(IsUndetectableAndBranch)                 \
@@ -992,22 +991,6 @@ class LCompareMinusZeroAndBranch final : public LControlInstruction<1, 1> {
 };
 
 
-class LIsObjectAndBranch final : public LControlInstruction<1, 1> {
- public:
-  LIsObjectAndBranch(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
-    temps_[0] = temp;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-  LOperand* temp() { return temps_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch, "is-object-and-branch")
-
-  void PrintDataTo(StringStream* stream) override;
-};
-
-
 class LIsStringAndBranch final : public LControlInstruction<1, 1> {
  public:
   LIsStringAndBranch(LOperand* value, LOperand* temp) {