--- a/src/hotspot/share/gc/g1/g1RemSet.cpp	Tue Oct 08 20:47:46 2019 +0200
+++ b/src/hotspot/share/gc/g1/g1RemSet.cpp	Tue Oct 08 15:15:50 2019 -0400
@@ -489,7 +489,6 @@
   _scan_state(new G1RemSetScanState()),
   _prev_period_summary(),
   _g1h(g1h),
-  _num_conc_refined_cards(0),
   _ct(ct),
   _g1p(_g1h->policy()),
   _hot_card_cache(hot_card_cache) {
@@ -1377,7 +1376,6 @@
 
   G1ConcurrentRefineOopClosure conc_refine_cl(_g1h, worker_id);
   if (r->oops_on_memregion_seq_iterate_careful<false>(dirty_region, &conc_refine_cl) != NULL) {
-    _num_conc_refined_cards++; // Unsynchronized update, only used for logging.
     return;
   }