[stubs] Simplify the ArrayConstructorStub.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 7a803622f1ffd3ddb015bc1e40ceb7a018b7a298..3fb265a6aa5f2fe433bce2e1a1c05d6b2af54647 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -1091,24 +1091,12 @@ enum AllocationSiteOverrideMode {
 
 class ArrayConstructorStub: public PlatformCodeStub {
  public:
-  enum ArgumentCountKey { ANY, NONE, ONE, MORE_THAN_ONE };
-
-  ArrayConstructorStub(Isolate* isolate, int argument_count);
-
   explicit ArrayConstructorStub(Isolate* isolate);
 
  private:
-  ArgumentCountKey argument_count() const {
-    return ArgumentCountBits::decode(minor_key_);
-  }
-
   void GenerateDispatchToArrayStub(MacroAssembler* masm,
                                    AllocationSiteOverrideMode mode);
 
-  void PrintName(std::ostream& os) const override;  // NOLINT
-
-  class ArgumentCountBits : public BitField<ArgumentCountKey, 0, 2> {};
-
   DEFINE_CALL_INTERFACE_DESCRIPTOR(ArrayNArgumentsConstructor);
   DEFINE_PLATFORM_CODE_STUB(ArrayConstructor, PlatformCodeStub);
 };