--- old/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2019-02-27 09:29:43.428377851 +0100
+++ new/src/hotspot/share/gc/shared/genCollectedHeap.hpp	2019-02-27 09:29:43.221371219 +0100
@@ -278,13 +278,6 @@
   // non-object.
   virtual HeapWord* block_start(const void* addr) const;
 
-  // Requires "addr" to be the start of a chunk, and returns its size.
-  // "addr + size" is required to be the start of a new chunk, or the end
-  // of the active area of the heap. Assumes (and verifies in non-product
-  // builds) that addr is in the allocated part of the heap and is
-  // the start of a chunk.
-  virtual size_t block_size(const HeapWord* addr) const;
-
   // Requires "addr" to be the start of a block, and returns "TRUE" iff
   // the block is an object. Assumes (and verifies in non-product
   // builds) that addr is in the allocated part of the heap and is