diff -r c036b84c6bbf -r 758deedaae84 src/hotspot/share/gc/g1/g1FullGCReferenceProcessorExecutor.hpp
--- a/src/hotspot/share/gc/g1/g1FullGCReferenceProcessorExecutor.hpp	Wed May 09 11:24:12 2018 +0200
+++ b/src/hotspot/share/gc/g1/g1FullGCReferenceProcessorExecutor.hpp	Wed May 09 13:37:05 2018 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -51,7 +51,6 @@
 
   // Executes the given task using concurrent marking worker threads.
   virtual void execute(ProcessTask& task);
-  virtual void execute(EnqueueTask& task);
 
 private:
   void run_task(AbstractGangTask* task);
@@ -68,15 +67,6 @@
 
     virtual void work(uint worker_id);
   };
-
-  class G1RefEnqueueTaskProxy: public AbstractGangTask {
-    typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
-    EnqueueTask& _enq_task;
-
-  public:
-    G1RefEnqueueTaskProxy(EnqueueTask& enq_task);
-    virtual void work(uint worker_id);
-  };
 };
 
 #endif // SHARE_GC_G1_G1FULLGCREFERENCEPROCESSOREXECUTOR_HPP