Remove unused Group widget state

xfa/fwl/cfwl_checkbox.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_checkbox.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 174 matching lines @@
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_CKB_RadioButton) {
     if ((m_pProperties->m_dwStates & FWL_STATE_CKB_CheckMask) ==
         FWL_STATE_CKB_Unchecked) {
       CFWL_WidgetMgr* pWidgetMgr = GetOwnerApp()->GetWidgetMgr();
       if (!pWidgetMgr->IsFormDisabled()) {
         CFX_ArrayTemplate<CFWL_Widget*> radioarr;
         pWidgetMgr->GetSameGroupRadioButton(this, radioarr);
         CFWL_CheckBox* pCheckBox = nullptr;
         int32_t iCount = radioarr.GetSize();
         for (int32_t i = 0; i < iCount; i++) {
+          // TODO(dsinclair): This is a bug as radioarr will only ever have
+          // a nullptr set into it....
           pCheckBox = static_cast<CFWL_CheckBox*>(radioarr[i]);
           if (pCheckBox != this &&
               pCheckBox->GetStates() & FWL_STATE_CKB_Checked) {
             pCheckBox->SetCheckState(0);
             CFX_RectF rt = pCheckBox->GetWidgetRect();
             rt.left = rt.top = 0;
             m_pWidgetMgr->RepaintWidget(pCheckBox, rt);
             break;
           }
         }
@@ skipping 155 matching lines @@
 }
 
 void CFWL_CheckBox::OnKeyDown(CFWL_MessageKey* pMsg) {
   if (pMsg->m_dwKeyCode == FWL_VKEY_Tab)
     return;
   if (pMsg->m_dwKeyCode == FWL_VKEY_Return ||
       pMsg->m_dwKeyCode == FWL_VKEY_Space) {
     NextStates();
   }
 }