--- a/src/hotspot/share/gc/g1/g1FullCollector.hpp	Fri Mar 02 10:09:01 2018 +0100
+++ b/src/hotspot/share/gc/g1/g1FullCollector.hpp	Fri Mar 02 10:09:02 2018 +0100
@@ -85,10 +85,6 @@
   void verify_after_marking();
 
   void run_task(AbstractGangTask* task);
-
-  // Prepare compaction extension support.
-  void prepare_compaction_ext();
-  void prepare_compaction_common();
 };