Remove Release() from IFX_Edit_UndoItem.

fpdfsdk/include/fxedit/fxet_edit.h

Index: fpdfsdk/include/fxedit/fxet_edit.h
diff --git a/fpdfsdk/include/fxedit/fxet_edit.h b/fpdfsdk/include/fxedit/fxet_edit.h
index 8aa44a4bed6b6d5981c0cef7cef2559c31dc1e6f..9e5c40f5ff1b98e52fe690e16521dadaa26a98c6 100644
--- a/fpdfsdk/include/fxedit/fxet_edit.h
+++ b/fpdfsdk/include/fxedit/fxet_edit.h
@@ -325,12 +325,9 @@ class CFX_Edit_UndoItem : public IFX_Edit_UndoItem
 {
 public:
 	CFX_Edit_UndoItem() : m_bFirst(TRUE), m_bLast(TRUE) {}
-	virtual ~CFX_Edit_UndoItem(){}
 
-	virtual CFX_WideString					GetUndoTitle() {return L"";}
-	virtual void							Release(){delete this;}
+	CFX_WideString GetUndoTitle() override { return L""; }
 
-public:
 	void									SetFirst(FX_BOOL bFirst){m_bFirst = bFirst;}
 	FX_BOOL									IsFirst(){return m_bFirst;}
 	void									SetLast(FX_BOOL bLast){m_bLast = bLast;}
@@ -345,17 +342,15 @@ class CFX_Edit_GroupUndoItem : public IFX_Edit_UndoItem
 {
 public:
 	CFX_Edit_GroupUndoItem(const CFX_WideString& sTitle);
-	virtual ~CFX_Edit_GroupUndoItem();
+	~CFX_Edit_GroupUndoItem() override;
+
+	void							Undo() override;
+	void							Redo() override;
+	CFX_WideString					GetUndoTitle() override;
 
 	void									AddUndoItem(CFX_Edit_UndoItem* pUndoItem);
 	void									UpdateItems();
 
-public:
-	virtual void							Undo();
-	virtual void							Redo();
-	virtual CFX_WideString					GetUndoTitle();
-	virtual void							Release();
-
 private:
 	CFX_WideString							m_sTitle;
 	CFX_ArrayTemplate<CFX_Edit_UndoItem*>	m_Items;