Remove the GetCaption dataprovider method

xfa/fwl/core/cfwl_barcode.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/core/cfwl_barcode.h"
 
 #include <memory>
 
@@ skipping 84 matching lines @@
 
 void CFWL_Barcode::SetType(BC_TYPE type) {
   if (GetWidget())
     ToBarcode(GetWidget())->SetType(type);
 }
 
 bool CFWL_Barcode::IsProtectedType() {
   return GetWidget() ? ToBarcode(GetWidget())->IsProtectedType() : false;
 }
 
-void CFWL_Barcode::GetCaption(IFWL_Widget* pWidget, CFX_WideString& wsCaption) {
-}
-
 BC_CHAR_ENCODING CFWL_Barcode::GetCharEncoding() const {
   return m_eCharEncoding;
 }
 
 int32_t CFWL_Barcode::GetModuleHeight() const {
   return m_nModuleHeight;
 }
 
 int32_t CFWL_Barcode::GetModuleWidth() const {
   return m_nModuleWidth;
@@ skipping 35 matching lines @@
   return m_nECLevel;
 }
 
 bool CFWL_Barcode::GetTruncated() const {
   return m_bTruncated;
 }
 
 uint32_t CFWL_Barcode::GetBarcodeAttributeMask() const {
   return m_dwAttributeMask;
 }