--- a/src/hotspot/share/gc/z/zPage.hpp	Mon Mar 18 11:50:40 2019 +0100
+++ b/src/hotspot/share/gc/z/zPage.hpp	Mon Mar 18 11:50:40 2019 +0100
@@ -85,7 +85,6 @@
 
   bool is_allocating() const;
   bool is_relocatable() const;
-  bool is_detached() const;
 
   bool is_mapped() const;
   void set_pre_mapped();