Remove unused CJS_Value::Attach() variant

fpdfsdk/javascript/JS_Value.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "fpdfsdk/javascript/JS_Value.h"
 
 #include <time.h>
 
@@ skipping 57 matching lines @@
 }
 
 CJS_Value::~CJS_Value() {}
 
 CJS_Value::CJS_Value(const CJS_Value& other) = default;
 
 void CJS_Value::Attach(v8::Local<v8::Value> pValue) {
   m_pValue = pValue;
 }
 
-void CJS_Value::Attach(CJS_Value* pValue) {
-  if (pValue)
-    Attach(pValue->ToV8Value());
-}
-
 void CJS_Value::Detach() {
   m_pValue = v8::Local<v8::Value>();
 }
 
 int CJS_Value::ToInt() const {
   return FXJS_ToInt32(m_pJSRuntime->GetIsolate(), m_pValue);
 }
 
 bool CJS_Value::ToBool() const {
   return FXJS_ToBoolean(m_pJSRuntime->GetIsolate(), m_pValue);
@@ skipping 771 matching lines @@
   for (size_t i = 0; i < nKeywords; ++i) {
     const wchar_t* property = va_arg(ap, const wchar_t*);
     v8::Local<v8::Value> v8Value =
         FXJS_GetObjectElement(pRuntime->GetIsolate(), pObj, property);
     if (!v8Value->IsUndefined())
       result[i] = CJS_Value(pRuntime, v8Value);
   }
   va_end(ap);
   return result;
 }