--- old/src/hotspot/share/gc/cms/concurrentMarkSweepGeneration.hpp	2018-04-27 15:29:23.270203632 +0200
+++ new/src/hotspot/share/gc/cms/concurrentMarkSweepGeneration.hpp	2018-04-27 15:29:23.026203641 +0200
@@ -69,7 +69,6 @@
 class ParNewGeneration;
 class PromotionInfo;
 class ScanMarkedObjectsAgainCarefullyClosure;
-class TenuredGeneration;
 class SerialOldTracer;
 
 // A generic CMS bit map. It's the basis for both the CMS marking bit map