--- old/src/share/vm/gc/shared/generation.hpp	2017-09-01 13:03:03.966378196 +0200
+++ new/src/share/vm/gc/shared/generation.hpp	2017-09-01 13:03:03.830372791 +0200
@@ -550,7 +550,6 @@
   StatRecord* stat_record() { return &_stat_record; }
 
   virtual void print_summary_info();
-  virtual void print_summary_info_on(outputStream* st);
 
   // Performance Counter support
   virtual void update_counters() = 0;