--- a/src/hotspot/share/gc/parallel/psScavenge.cpp	Wed May 09 11:24:12 2018 +0200
+++ b/src/hotspot/share/gc/parallel/psScavenge.cpp	Wed May 09 13:37:05 2018 +0200
@@ -148,27 +148,8 @@
   _rp_task.work(_work_id, is_alive, keep_alive, evac_followers);
 }
 
-class PSRefEnqueueTaskProxy: public GCTask {
-  typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
-  EnqueueTask& _enq_task;
-  uint         _work_id;
-
-public:
-  PSRefEnqueueTaskProxy(EnqueueTask& enq_task, uint work_id)
-    : _enq_task(enq_task),
-      _work_id(work_id)
-  { }
-
-  virtual char* name() { return (char *)"Enqueue reference objects in parallel"; }
-  virtual void do_it(GCTaskManager* manager, uint which)
-  {
-    _enq_task.work(_work_id);
-  }
-};
-
 class PSRefProcTaskExecutor: public AbstractRefProcTaskExecutor {
   virtual void execute(ProcessTask& task);
-  virtual void execute(EnqueueTask& task);
 };
 
 void PSRefProcTaskExecutor::execute(ProcessTask& task)
@@ -188,17 +169,6 @@
   manager->execute_and_wait(q);
 }
 
-
-void PSRefProcTaskExecutor::execute(EnqueueTask& task)
-{
-  GCTaskQueue* q = GCTaskQueue::create();
-  GCTaskManager* manager = ParallelScavengeHeap::gc_task_manager();
-  for(uint i=0; i < manager->active_workers(); i++) {
-    q->enqueue(new PSRefEnqueueTaskProxy(task, i));
-  }
-  manager->execute_and_wait(q);
-}
-
 // This method contains all heap specific policy for invoking scavenge.
 // PSScavenge::invoke_no_policy() will do nothing but attempt to
 // scavenge. It will not clean up after failed promotions, bail out if