Kill dead IFWL_*::Initialize() variants dead.

xfa/include/fwl/basewidget/fwl_datetimepicker.h

 // 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
 
 #ifndef _FWL_DATETIMEPICKER_H
 #define _FWL_DATETIMEPICKER_H
 class CFWL_WidgetImpProperties;
 class IFWL_Widget;
@@ skipping 53 matching lines @@
 class IFWL_DateTimePickerDP : public IFWL_DataProvider {
  public:
   virtual FWL_ERR GetToday(IFWL_Widget* pWidget,
                            int32_t& iYear,
                            int32_t& iMonth,
                            int32_t& iDay) = 0;
 };
 class IFWL_DateTimePicker : public IFWL_Widget {
  public:
   static IFWL_DateTimePicker* Create();
-  FWL_ERR Initialize(IFWL_Widget* pOuter = NULL);
   FWL_ERR Initialize(const CFWL_WidgetImpProperties& properties,
-                     IFWL_Widget* pOuter = NULL);
+                     IFWL_Widget* pOuter);
   FWL_ERR GetCurSel(int32_t& iYear, int32_t& iMonth, int32_t& iDay);
   FWL_ERR SetCurSel(int32_t iYear, int32_t iMonth, int32_t iDay);
   FWL_ERR SetEditText(const CFX_WideString& wsText);
   FWL_ERR GetEditText(CFX_WideString& wsText,
                       int32_t nStart = 0,
                       int32_t nCount = -1) const;
   int32_t CountSelRanges();
   int32_t GetSelRange(int32_t nIndex, int32_t& nStart);
   FX_BOOL CanUndo();
   FX_BOOL CanRedo();
@@ skipping 10 matching lines @@
   FX_BOOL DeSelect();
   FWL_ERR GetBBox(CFX_RectF& rect);
   FWL_ERR SetEditLimit(int32_t nLimit);
   FWL_ERR ModifyEditStylesEx(FX_DWORD dwStylesExAdded,
                              FX_DWORD dwStylesExRemoved);
 
  protected:
   IFWL_DateTimePicker();
 };
 #endif