--- old/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2020-08-07 13:16:03.230101381 +0200
+++ new/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2020-08-07 13:16:03.110099473 +0200
@@ -290,10 +290,6 @@
   // Ensure parsability: override
   virtual void ensure_parsability(bool retire_tlabs);
 
-  // Time in ms since the longest time a collector ran in
-  // in any generation.
-  virtual jlong millis_since_last_gc();
-
   // Total number of full collections completed.
   unsigned int total_full_collections_completed() {
     assert(_full_collections_completed <= _total_full_collections,
@@ -306,12 +302,6 @@
   // Update above counter, as appropriate, at the end of a concurrent GC cycle
   unsigned int update_full_collections_completed(unsigned int count);
 
-  // Update "time of last gc" for all generations to "now".
-  void update_time_of_last_gc(jlong now) {
-    _young_gen->update_time_of_last_gc(now);
-    _old_gen->update_time_of_last_gc(now);
-  }
-
   // Update the gc statistics for each generation.
   void update_gc_stats(Generation* current_generation, bool full) {
     _old_gen->update_gc_stats(current_generation, full);