Remove unused Group widget state

xfa/fwl/cfwl_widgetmgr.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 "xfa/fwl/cfwl_widgetmgr.h"
 
 #include <utility>
 
@@ skipping 294 matching lines @@
 int32_t CFWL_WidgetMgr::CountRadioButtonGroup(CFWL_Widget* pFirst) const {
   int32_t iRet = 0;
   CFWL_Widget* pChild = pFirst;
   while (pChild) {
     pChild = GetNextSiblingWidget(pChild);
     ++iRet;
   }
   return iRet;
 }
 
-CFWL_Widget* CFWL_WidgetMgr::GetRadioButtonGroupHeader(
-    CFWL_Widget* pRadioButton) const {
-  CFWL_Widget* pNext = pRadioButton;
-  if (pNext && (pNext->GetStyles() & FWL_WGTSTYLE_Group))
-    return pNext;
-  return nullptr;
-}
-
 void CFWL_WidgetMgr::GetSameGroupRadioButton(
     CFWL_Widget* pRadioButton,
     CFX_ArrayTemplate<CFWL_Widget*>& group) const {
   CFWL_Widget* pFirst = GetFirstSiblingWidget(pRadioButton);
   if (!pFirst)
     pFirst = pRadioButton;
 
   int32_t iGroup = CountRadioButtonGroup(pFirst);
   if (iGroup < 2)
     return;
-  group.Add(GetRadioButtonGroupHeader(pRadioButton));
+  group.Add(nullptr);
 }
 
 CFWL_Widget* CFWL_WidgetMgr::GetDefaultButton(CFWL_Widget* pParent) const {
   if ((pParent->GetClassID() == FWL_Type::PushButton) &&
       (pParent->GetStates() & (1 << (FWL_WGTSTATE_MAX + 2)))) {
     return pParent;
   }
 
   CFWL_Widget* child =
       pParent->GetOwnerApp()->GetWidgetMgr()->GetFirstChildWidget(pParent);
@@ skipping 274 matching lines @@
       pWidget(widget),
       iRedrawCounter(0)
 #if (_FX_OS_ == _FX_WIN32_DESKTOP_) || (_FX_OS_ == _FX_WIN64_)
       ,
       bOutsideChanged(false)
 #endif
 {
 }
 
 CFWL_WidgetMgr::Item::~Item() {}