--- a/src/hotspot/share/runtime/thread.hpp	Fri Sep 20 11:07:52 2019 +0100
+++ b/src/hotspot/share/runtime/thread.hpp	Fri Sep 20 10:23:40 2019 -0400
@@ -802,7 +802,6 @@
   static void SpinAcquire(volatile int * Lock, const char * Name);
   static void SpinRelease(volatile int * Lock);
   static void muxAcquire(volatile intptr_t * Lock, const char * Name);
-  static void muxAcquireW(volatile intptr_t * Lock, ParkEvent * ev);
   static void muxRelease(volatile intptr_t * Lock);
 };