--- old/src/hotspot/os/aix/os_aix.hpp	Tue Nov 14 05:34:05 2017
+++ new/src/hotspot/os/aix/os_aix.hpp	Tue Nov 14 05:34:03 2017
@@ -99,12 +99,6 @@
   // Given an address, returns the size of the page backing that address
   static size_t query_pagesize(void* p);
 
-  // Return `true' if the calling thread is the primordial thread. The
-  // primordial thread is the thread which contains the main function,
-  // *not* necessarily the thread which initialized the VM by calling
-  // JNI_CreateJavaVM.
-  static bool is_primordial_thread(void);
-
   static int page_size(void) {
     assert(_page_size != -1, "not initialized");
     return _page_size;