--- old/src/hotspot/share/gc/shared/collectedHeap.cpp	2020-08-14 20:19:30.917811885 +0200
+++ new/src/hotspot/share/gc/shared/collectedHeap.cpp	2020-08-14 20:19:30.741808722 +0200
@@ -122,19 +122,6 @@
                           ms_chunk_free_list_summary, class_chunk_free_list_summary);
 }
 
-void CollectedHeap::run_task_at_safepoint(AbstractGangTask* task, uint num_workers) {
-  assert(SafepointSynchronize::is_at_safepoint(), "Should only be called at a safepoint");
-
-  WorkGang* gang = get_safepoint_workers();
-  if (gang == NULL) {
-    // GC doesn't support parallel worker threads.
-    // Execute in this thread with worker id 0.
-    task->work(0);
-  } else {
-    gang->run_task(task, num_workers);
-  }
-}
-
 void CollectedHeap::print_heap_before_gc() {
   Universe::print_heap_before_gc();
   if (_gc_heap_log != NULL) {