Remove unused XFA_GetElementChildren.

xfa/fxfa/include/fxfa_basic.h

 // 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
 
 #ifndef XFA_FXFA_INCLUDE_FXFA_BASIC_H_
 #define XFA_FXFA_INCLUDE_FXFA_BASIC_H_
 
 #include "fxjse/include/cfxjse_arguments.h"
@@ skipping 969 matching lines @@
 };
 
 struct XFA_SCRIPTHIERARCHY {
   uint16_t wMethodStart;
   uint16_t wMethodCount;
   uint16_t wAttributeStart;
   uint16_t wAttributeCount;
   int16_t wParentIndex;
 };
 
-const uint16_t* XFA_GetElementChildren(XFA_ELEMENT eElement, int32_t& iCount);
 const uint8_t* XFA_GetElementAttributes(XFA_ELEMENT eElement, int32_t& iCount);
 
 const XFA_ATTRIBUTEINFO* XFA_GetAttributeOfElement(XFA_ELEMENT eElement,
                                                    XFA_ATTRIBUTE eAttribute,
                                                    uint32_t dwPacket);
 #define XFA_PROPERTYFLAG_OneOf 0x01
 #define XFA_PROPERTYFLAG_DefaultOneOf 0x02
 struct XFA_PROPERTY {
   uint16_t eName;
   uint8_t uOccur;
@@ skipping 74 matching lines @@
   const FX_WCHAR* pName;
   XFA_ATTRIBUTE_CALLBACK lpfnCallback;
   int32_t eAttribute;
   uint16_t eValueType;
 };
 const XFA_SCRIPTATTRIBUTEINFO* XFA_GetScriptAttributeByName(
     XFA_ELEMENT eElement,
     const CFX_WideStringC& wsAttributeName);
 
 #endif  // XFA_FXFA_INCLUDE_FXFA_BASIC_H_