--- old/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	2020-08-14 20:19:54.454234875 +0200
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	2020-08-14 20:19:53.946225746 +0200
@@ -551,9 +551,6 @@
 
   WorkGang* workers() const { return _workers; }
 
-  // Runs the given AbstractGangTask with the current active workers.
-  virtual void run_task(AbstractGangTask* task);
-
   // Runs the given AbstractGangTask with the current active workers,
   // returning the total time taken.
   Tickspan run_task_timed(AbstractGangTask* task);