--- old/src/hotspot/share/runtime/vm_operations.hpp	2018-05-31 22:45:10.652541103 -0400
+++ new/src/hotspot/share/runtime/vm_operations.hpp	2018-05-31 22:45:09.112451914 -0400
@@ -421,7 +421,6 @@
   DeadlockCycle* result()      { return _deadlocks; };
   VMOp_Type type() const       { return VMOp_FindDeadlocks; }
   void doit();
-  bool doit_prologue();
 };
 
 class ThreadDumpResult;