--- a/src/hotspot/os/aix/os_aix.hpp	Wed Oct 16 14:32:17 2019 -0700
+++ b/src/hotspot/os/aix/os_aix.hpp	Thu Oct 17 00:00:13 2019 +0200
@@ -44,7 +44,6 @@
 
   static julong _physical_memory;
   static pthread_t _main_thread;
-  static Mutex* _createThread_lock;
   static int _page_size;
 
   // -1 = uninitialized, 0 = AIX, 1 = OS/400 (PASE)
@@ -90,8 +89,6 @@
  public:
   static void init_thread_fpu_state();
   static pthread_t main_thread(void)                                { return _main_thread; }
-  static void set_createThread_lock(Mutex* lk)                      { _createThread_lock = lk; }
-  static Mutex* createThread_lock(void)                             { return _createThread_lock; }
   static void hotspot_sigmask(Thread* thread);
 
   // Given an address, returns the size of the page backing that address