--- a/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Wed Jul 05 19:26:54 2017 +0200
+++ b/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Mon Dec 16 08:54:14 2013 +0100
@@ -166,14 +166,6 @@
   HeapWord** top_addr() const;
   HeapWord** end_addr() const;
 
-  // Return an estimate of the maximum allocation that could be performed
-  // without triggering any collection activity.  In a generational
-  // collector, for example, this is probably the largest allocation that
-  // could be supported in the youngest generation.  It is "unsafe" because
-  // no locks are taken; the result should be treated as an approximation,
-  // not a guarantee.
-  size_t unsafe_max_alloc();
-
   // Does this heap support heap inspection? (+PrintClassHistogram)
   virtual bool supports_heap_inspection() const { return true; }