--- old/src/hotspot/share/gc/z/zWorkers.hpp	2019-11-19 19:43:07.873194559 +0100
+++ new/src/hotspot/share/gc/z/zWorkers.hpp	2019-11-19 19:43:07.331176726 +0100
@@ -37,9 +37,6 @@
   void run(ZTask* task, uint nworkers);
 
 public:
-  static uint calculate_nparallel();
-  static uint calculate_nconcurrent();
-
   ZWorkers();
 
   uint nparallel() const;