Cleanup: Remove dead formfiller code.

fpdfsdk/src/formfiller/FFL_ComboBox.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 "../../include/formfiller/FormFiller.h"
 #include "../../include/formfiller/FFL_FormFiller.h"
 #include "../../include/formfiller/FFL_IFormFiller.h"
 #include "../../include/formfiller/FFL_CBA_Fontmap.h"
@@ skipping 358 matching lines @@
         return FALSE;
 }
 
 FX_BOOL CFFL_ComboBox::CanPaste(CPDFSDK_Document* pDocument)
 {
         ASSERT(pDocument != NULL);
 
         return FALSE;
 }
 
-void CFFL_ComboBox::DoCopy(CPDFSDK_Document* pDocument)
-{
-        ASSERT(pDocument != NULL);
-}
-
-void CFFL_ComboBox::DoCut(CPDFSDK_Document* pDocument)
-{
-        ASSERT(pDocument != NULL);
-}
-
-void CFFL_ComboBox::DoPaste(CPDFSDK_Document* pDocument)
-{
-        ASSERT(pDocument != NULL);
-}
-
 void CFFL_ComboBox::OnAddUndo(CPWL_Edit* pEdit)
 {
         ASSERT(pEdit != NULL);
 }
 
 CFX_WideString CFFL_ComboBox::GetSelectExportText()
 {
         CFX_WideString swRet;
 
         int nExport = -1;
         CPDFSDK_PageView *pPageView = GetCurPageView();
         if (CPWL_ComboBox * pComboBox = (CPWL_ComboBox*)GetPDFWindow(pPageView, FALSE))
         {
                 nExport = pComboBox->GetSelect();
         }
 
         if (nExport >= 0)
         {
                 if (CPDF_FormField * pFormField = m_pWidget->GetFormField())
                 {
                         swRet = pFormField->GetOptionValue(nExport);
                         if (swRet.IsEmpty())
                                 swRet = pFormField->GetOptionLabel(nExport);
                 }
         }
 
         return swRet;
 }