--- a/src/hotspot/share/gc/shared/collectedHeap.hpp	Mon Jun 17 09:40:07 2019 +0000
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp	Wed Jun 19 08:43:23 2019 +0200
@@ -534,11 +534,6 @@
 
   virtual size_t obj_size(oop obj) const;
 
-  // Cells are memory slices allocated by the allocator. Objects are initialized
-  // in cells. The cell itself may have a header, found at a negative offset of
-  // oops. Usually, the size of the cell header is 0, but it may be larger.
-  virtual ptrdiff_t cell_header_size() const { return 0; }
-
   // Non product verification and debugging.
 #ifndef PRODUCT
   // Support for PromotionFailureALot.  Return true if it's time to cause a