Cleanup unused methods and return values in FWL code.

xfa/fwl/core/ifwl_datetimeedit.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/ifwl_datetimeedit.h"
 
 #include "xfa/fwl/core/cfwl_widgetmgr.h"
 #include "xfa/fwl/core/ifwl_datetimepicker.h"
 
 IFWL_DateTimeEdit::IFWL_DateTimeEdit(const CFWL_WidgetImpProperties& properties,
                                      IFWL_Widget* pOuter)
     : IFWL_Edit(properties, pOuter) {}
 
 FWL_Error IFWL_DateTimeEdit::Initialize() {
   m_pDelegate = new CFWL_DateTimeEditImpDelegate(this);
   if (IFWL_Edit::Initialize() != FWL_Error::Succeeded)
     return FWL_Error::Indefinite;
   return FWL_Error::Succeeded;
 }
 
-FWL_Error IFWL_DateTimeEdit::Finalize() {
+void IFWL_DateTimeEdit::Finalize() {
   delete m_pDelegate;
   m_pDelegate = nullptr;
-  return IFWL_Edit::Finalize();
+  IFWL_Edit::Finalize();
 }
 
 CFWL_DateTimeEditImpDelegate::CFWL_DateTimeEditImpDelegate(
     IFWL_DateTimeEdit* pOwner)
     : CFWL_EditImpDelegate(pOwner), m_pOwner(pOwner) {}
 
 void CFWL_DateTimeEditImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   if (m_pOwner->m_pWidgetMgr->IsFormDisabled()) {
     DisForm_OnProcessMessage(pMessage);
     return;
@@ skipping 26 matching lines @@
           pDateTime->GetWidgetRect(rtInvalidate);
           pDateTime->ShowMonthCalendar(FALSE);
           rtInvalidate.Offset(-rtInvalidate.left, -rtInvalidate.top);
           pDateTime->Repaint(&rtInvalidate);
         }
       }
     }
   }
   CFWL_EditImpDelegate::OnProcessMessage(pMessage);
 }