Remove unused FWL Panel code.

xfa/fwl/lightwidget/cfwl_tooltip.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/lightwidget/cfwl_tooltip.h"
 
 #include <memory>
 
 #include "xfa/fwl/core/fwl_formimp.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
-#include "xfa/fwl/core/fwl_panelimp.h"
 #include "xfa/fwl/core/fwl_targetimp.h"
 #include "xfa/fwl/core/fwl_threadimp.h"
 #include "xfa/fwl/core/fwl_widgetimp.h"
 
 CFWL_ToolTip* CFWL_ToolTip::Create() {
   return new CFWL_ToolTip;
 }
 
 FWL_ERR CFWL_ToolTip::Initialize(const CFWL_WidgetProperties* pProperties) {
   if (m_pIface)
@@ skipping 101 matching lines @@
 }
 
 CFX_SizeF CFWL_ToolTip::CFWL_ToolTipDP::GetToolTipIconSize(
     IFWL_Widget* pWidget) {
   return m_fIconSize;
 }
 
 CFX_RectF CFWL_ToolTip::CFWL_ToolTipDP::GetAnchor() {
   return m_fAnchor;
 }