--- old/src/hotspot/share/gc/shared/barrierSet.hpp	2019-09-10 12:46:02.377145104 +0200
+++ new/src/hotspot/share/gc/shared/barrierSet.hpp	2019-09-10 12:46:02.127136844 +0200
@@ -144,10 +144,6 @@
 
   virtual void make_parsable(JavaThread* thread) {}
 
-#ifdef CHECK_UNHANDLED_OOPS
-  virtual bool oop_equals_operator_allowed() { return true; }
-#endif
-
 public:
   // Print a description of the memory for the barrier set
   virtual void print_on(outputStream* st) const = 0;