Remove ref counting from CFWL_Event

xfa/fwl/core/cfwl_event.h

Index: xfa/fwl/core/cfwl_event.h
diff --git a/xfa/fwl/core/cfwl_event.h b/xfa/fwl/core/cfwl_event.h
index e7bc15ad58a9b066d48fcb8495aa457d7e9dd748..a20abaa2a2637f4e1a31e55479a9b553b6e38773 100644
--- a/xfa/fwl/core/cfwl_event.h
+++ b/xfa/fwl/core/cfwl_event.h
@@ -78,17 +78,12 @@ class CFWL_Event {
 
   virtual CFWL_EventType GetClassID() const;
 
-  uint32_t Release();
-
   IFWL_Widget* m_pSrcTarget;
   IFWL_Widget* m_pDstTarget;
-
- private:
-  uint32_t m_dwRefCount;
 };
 
 inline CFWL_Event::CFWL_Event()
-    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr), m_dwRefCount(1) {}
+    : m_pSrcTarget(nullptr), m_pDstTarget(nullptr) {}
 
 inline CFWL_Event::~CFWL_Event() {}
 
@@ -96,14 +91,6 @@ inline CFWL_EventType CFWL_Event::GetClassID() const {
   return CFWL_EventType::None;
 }
 
-inline uint32_t CFWL_Event::Release() {
-  m_dwRefCount--;
-  uint32_t dwRefCount = m_dwRefCount;
-  if (!m_dwRefCount)
-    delete this;
-  return dwRefCount;
-}
-
 #define FWL_EVENT_DEF(classname, eventType, ...)                            \
   class classname : public CFWL_Event {                                     \
    public:                                                                  \