8263170: ComboBoxModel documentation refers to a nonexistent type

Reviewed-by: azvegint, trebari, pbansal, aivanov, kizune

Author: prsadhuk

src/java.desktop/share/classes/javax/swing/ComboBoxModel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,7 +25,7 @@
 package javax.swing;
 
 /**
- * A data model for a combo box. This interface extends <code>ListDataModel</code>
+ * A data model for a combo box. This interface extends <code>ListModel</code>
  * and adds the concept of a <i>selected item</i>. The selected item is generally
  * the item which is visible in the combo box display area.
  * <p>