Merge to XFA: Cleanup: Remove dead formfiller code.

fpdfsdk/src/formfiller/FFL_TextField.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/FFL_TextField.h"
 #include "../../include/formfiller/FFL_CBA_Fontmap.h"
 
 /* ------------------------------- CFFL_TextField
@@ skipping 296 matching lines @@
 }
 
 FX_BOOL CFFL_TextField::CanCut(CPDFSDK_Document* pDocument) {
   return FALSE;
 }
 
 FX_BOOL CFFL_TextField::CanPaste(CPDFSDK_Document* pDocument) {
   return FALSE;
 }
 
-void CFFL_TextField::DoCopy(CPDFSDK_Document* pDocument) {}
-
-void CFFL_TextField::DoCut(CPDFSDK_Document* pDocument) {}
-
-void CFFL_TextField::DoPaste(CPDFSDK_Document* pDocument) {}
-
 void CFFL_TextField::OnAddUndo(CPWL_Edit* pEdit) {}