8338785: The java.awt.datatransfer.SystemFlavorMap#FLAVOR_MAP_KEY field is not used

Reviewed-by: honkar, dnguyen, prr

Author: mrserb

src/java.datatransfer/share/classes/java/awt/datatransfer/SystemFlavorMap.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2024, 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
@@ -61,8 +61,6 @@ public final class SystemFlavorMap implements FlavorMap, FlavorTable {
      */
     private static String JavaMIME = "JAVA_DATAFLAVOR:";
 
-    private static final Object FLAVOR_MAP_KEY = new Object();
-
     /**
      * The list of valid, decoded text flavor representation classes, in order
      * from best to worst.