--- a/src/hotspot/share/runtime/objectMonitor.hpp	Tue Sep 25 11:24:59 2018 +0800
+++ b/src/hotspot/share/runtime/objectMonitor.hpp	Mon Sep 24 22:12:07 2018 -0700
@@ -195,11 +195,6 @@
   static PerfCounter * _sync_Deflations;
   static PerfLongVariable * _sync_MonExtant;
 
-  static int Knob_ExitRelease;
-  static int Knob_InlineNotify;
-  static int Knob_Verbose;
-  static int Knob_VerifyInUse;
-  static int Knob_VerifyMatch;
   static int Knob_SpinLimit;
 
   void* operator new (size_t size) throw();