Remove unused FWL Panel code.

xfa/fwl/basewidget/fwl_tooltipctrlimp.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/basewidget/fwl_tooltipctrlimp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/ifwl_tooltip.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/cfwl_themetext.h"
 #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_widgetimp.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 #include "xfa/fwl/core/ifwl_tooltiptarget.h"
 
 // static
 IFWL_ToolTip* IFWL_ToolTip::Create(const CFWL_WidgetImpProperties& properties,
                                    IFWL_Widget* pOuter) {
   IFWL_ToolTip* pToolTip = new IFWL_ToolTip;
   CFWL_ToolTipImp* pToolTipImpl = new CFWL_ToolTipImp(properties, pOuter);
@@ skipping 261 matching lines @@
 int32_t CFWL_ToolTipImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   return CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
 }
 FWL_ERR CFWL_ToolTipImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {
   return FWL_ERR_Succeeded;
 }
 FWL_ERR CFWL_ToolTipImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                               const CFX_Matrix* pMatrix) {
   return m_pOwner->DrawWidget(pGraphics, pMatrix);
 }