--- old/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	2020-08-05 21:29:24.497604249 +0800
+++ new/src/hotspot/share/gc/epsilon/epsilonHeap.cpp	2020-08-05 21:29:24.193604238 +0800
@@ -277,11 +277,6 @@
   _space->object_iterate(cl);
 }
 
-// No workGang for EpsilonHeap, work serially with thread 0
-void EpsilonHeap::run_task(AbstractGangTask* task) {
-  task->work(0);
-}
-
 void EpsilonHeap::print_on(outputStream *st) const {
   st->print_cr("Epsilon Heap");