--- old/src/hotspot/share/gc/shared/referenceProcessorPhaseTimes.hpp	2018-04-23 16:50:44.247547286 +0200
+++ new/src/hotspot/share/gc/shared/referenceProcessorPhaseTimes.hpp	2018-04-23 16:50:43.962538402 +0200
@@ -46,7 +46,6 @@
     FinalRefPhase3,
     PhantomRefPhase2,
     PhantomRefPhase3,
-    RefEnqueue,
     RefParPhaseMax
   };
 
@@ -133,7 +132,6 @@
   // Reset all fields. If not reset at next cycle, an assertion will fail.
   void reset();
 
-  void print_enqueue_phase(uint base_indent = 0, bool print_total = true) const;
   void print_all_references(uint base_indent = 0, bool print_total = true) const;
 };
 
@@ -203,13 +201,4 @@
   ~RefProcPhaseTimesTracker();
 };
 
-// Updates enqueue time related information.
-// - Enqueueing time, enqueued reference count and stats for each working thread if MT processed.
-class RefProcEnqueueTimeTracker : public RefProcPhaseTimeBaseTracker {
-public:
-  RefProcEnqueueTimeTracker(ReferenceProcessorPhaseTimes* phase_times,
-                            ReferenceProcessorStats& stats);
-  ~RefProcEnqueueTimeTracker();
-};
-
 #endif // SHARE_VM_GC_SHARED_REFERENCEPROCESSORPHASETIMES_HPP