Remove some FWL code.

xfa/fwl/core/fwl_threadimp.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/fwl_threadimp.h"
 
 #include "xfa/fwl/core/fwl_appimp.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/fwl_targetimp.h"
 #include "xfa/fwl/core/ifwl_notethread.h"
 
 void IFWL_Thread::Release() {
   delete m_pImpl;
 }
-FWL_ERR IFWL_Thread::Run(FWL_HTHREAD hThread) {
-  return m_pImpl->Run(hThread);
-}
+
 IFWL_NoteDriver* IFWL_NoteThread::GetNoteDriver() {
   return static_cast<CFWL_NoteThreadImp*>(GetImpl())->GetNoteDriver();
 }
 
-FWL_ERR CFWL_ThreadImp::Run(FWL_HTHREAD hThread) {
-  return FWL_ERR_Succeeded;
-}
 CFWL_NoteThreadImp::CFWL_NoteThreadImp(IFWL_NoteThread* pIface)
     : CFWL_ThreadImp(pIface), m_pNoteDriver(new CFWL_NoteDriver) {}
+
 CFWL_NoteThreadImp::~CFWL_NoteThreadImp() {
   delete m_pNoteDriver;
 }
-FWL_ERR CFWL_NoteThreadImp::Run(FWL_HTHREAD hThread) {
-  if (!m_pNoteDriver)
-    return FWL_ERR_Indefinite;
-  return m_pNoteDriver->Run();
-}
+
 IFWL_NoteDriver* CFWL_NoteThreadImp::GetNoteDriver() {
   return m_pNoteDriver;
 }