--- a/src/hotspot/share/gc/parallel/psParallelCompact.hpp	Fri Aug 16 09:18:35 2019 +0200
+++ b/src/hotspot/share/gc/parallel/psParallelCompact.hpp	Fri Aug 16 09:18:38 2019 +0200
@@ -40,8 +40,7 @@
 class ParCompactionManager;
 class ParallelTaskTerminator;
 class PSParallelCompact;
-class GCTaskManager;
-class GCTaskQueue;
+class PreGCValues;
 class MoveAndUpdateClosure;
 class RefProcTaskExecutor;
 class ParallelOldTracer;
@@ -1114,9 +1113,6 @@
   static unsigned int total_invocations() { return _total_invocations; }
   static CollectorCounters* counters()    { return _counters; }
 
-  // Used to add tasks
-  static GCTaskManager* const gc_task_manager();
-
   // Marking support
   static inline bool mark_obj(oop obj);
   static inline bool is_marked(oop obj);