--- old/src/hotspot/share/gc/z/zCollectedHeap.cpp	2020-08-07 13:16:05.734141176 +0200
+++ new/src/hotspot/share/gc/z/zCollectedHeap.cpp	2020-08-07 13:16:05.610139208 +0200
@@ -277,10 +277,6 @@
   return _runtime_workers.workers();
 }
 
-jlong ZCollectedHeap::millis_since_last_gc() {
-  return ZStatCycle::time_since_last() / MILLIUNITS;
-}
-
 void ZCollectedHeap::gc_threads_do(ThreadClosure* tc) const {
   tc->do_thread(_director);
   tc->do_thread(_driver);