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

xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp

Index: xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp
diff --git a/xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp b/xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp
index c8f986d4f8ae10dc057e606f07c41e08d2ee666c..49719a91ac1de87c1bb9de5110c6633f0f38d5d6 100644
--- a/xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp
+++ b/xfa/src/fwl/src/basewidget/fwl_pushbuttonimp.cpp
@@ -12,12 +12,6 @@
 IFWL_PushButton* IFWL_PushButton::Create() {
   return new IFWL_PushButton;
 }
-FWL_ERR IFWL_PushButton::Initialize(IFWL_Widget* pOuter) {
-  CFWL_PushButtonImp* pPushButtonImpl = new CFWL_PushButtonImp(pOuter);
-  SetImpl(pPushButtonImpl);
-  pPushButtonImpl->SetInterface(this);
-  return pPushButtonImpl->Initialize();
-}
 FWL_ERR IFWL_PushButton::Initialize(const CFWL_WidgetImpProperties& properties,
                                     IFWL_Widget* pOuter) {
   CFWL_PushButtonImp* pPushButtonImpl =