src/java.base/share/classes/java/lang/Thread.java

@@ -192,15 +192,10 @@
      * likes with this number; some VMs will ignore it.
      */
     private final long stackSize;
 
     /*
-     * JVM-private state that persists after native thread termination.
-     */
-    private long nativeParkEventPointer;
-
-    /*
      * Thread ID
      */
     private final long tid;
 
     /* For generating thread ID */