Remove unused code.

xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp

Index: xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp
diff --git a/xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp b/xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp
deleted file mode 100644
index fcb723262208e43fa58bc14e3556dfc4d43e0ca6..0000000000000000000000000000000000000000
--- a/xfa/fwl/lightwidget/cfwl_widgetdelegate.cpp
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright 2016 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_widgetdelegate.h"
-
-#include "xfa/fwl/core/cfwl_event.h"
-#include "xfa/fwl/core/cfwl_message.h"
-
-CFWL_WidgetDelegate::CFWL_WidgetDelegate() {}
-
-CFWL_WidgetDelegate::~CFWL_WidgetDelegate() {}
-
-void CFWL_WidgetDelegate::OnProcessMessage(CFWL_Message* pMessage) {}
-
-void CFWL_WidgetDelegate::OnProcessEvent(CFWL_Event* pEvent) {}
-
-void CFWL_WidgetDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
-                                       const CFX_Matrix* pMatrix) {}