Remove events which are not processed

xfa/fwl/core/cfwl_event.h

 // 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
 
 #ifndef XFA_FWL_CORE_CFWL_EVENT_H_
 #define XFA_FWL_CORE_CFWL_EVENT_H_
 
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_string.h"
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fwl/core/cfwl_msgkey.h"
 #include "xfa/fwl/core/cfwl_msgmouse.h"
 #include "xfa/fwl/core/fwl_error.h"
 
 enum class CFWL_EventType {
   None = 0,
 
   CheckStateChanged,
   CheckWord,
   Click,
   Close,
-  CloseUp,
   DrawItem,
-  DropDown,
   EditChanged,
-  HoverChanged,
   Key,
   KillFocus,
   Mouse,
   MouseWheel,
   PostDropDown,
   PreDropDown,
   Scroll,
   SelectChanged,
   SetFocus,
   SizeChanged,
@@ skipping 35 matching lines @@
     classname();                                                            \
     ~classname() override;                                                  \
     CFWL_EventType GetClassID() const override;                             \
     __VA_ARGS__                                                             \
   };                                                                        \
   inline classname::classname() {}                                          \
   inline classname::~classname() {}                                         \
   inline CFWL_EventType classname::GetClassID() const { return eventType; }
 
 #endif  // XFA_FWL_CORE_CFWL_EVENT_H_