--- old/src/share/vm/gc/g1/g1RemSet.hpp	2017-07-12 12:13:42.850620971 +0200
+++ new/src/share/vm/gc/g1/g1RemSet.hpp	2017-07-12 12:13:42.754617994 +0200
@@ -49,22 +49,11 @@
 class G1ScanObjsDuringUpdateRSClosure;
 class HeapRegionClaimer;
 
-// Closure used for updating remembered sets and recording references that
-// point into the collection set while the mutator is running.
-// Assumed to be only executed concurrently with the mutator. Yields via
-// SuspendibleThreadSet after every card.
-class G1RefineCardConcurrentlyClosure: public CardTableEntryClosure {
-public:
-  bool do_card_ptr(jbyte* card_ptr, uint worker_i);
-};
-
 // A G1RemSet in which each heap region has a rem set that records the
 // external heap references into it.  Uses a mod ref bs to track updates,
 // so that they can be used to update the individual region remsets.
 class G1RemSet: public CHeapObj<mtGC> {
 private:
-  G1RefineCardConcurrentlyClosure _refine_card_concurrently_cl;
-
   G1RemSetScanState* _scan_state;
   G1CardLiveData _card_live_data;
 
@@ -138,8 +127,6 @@
   // Eliminates any remembered set entries that correspond to dead heap ranges.
   void scrub(uint worker_num, HeapRegionClaimer* hrclaimer);
 
-  G1RefineCardConcurrentlyClosure* refine_card_concurrently_closure() { return &_refine_card_concurrently_cl; }
-
   // Refine the card corresponding to "card_ptr". Safe to be called concurrently
   // to the mutator.
   void refine_card_concurrently(jbyte* card_ptr,