--- old/src/hotspot/share/oops/oop.hpp	2020-08-25 10:54:41.039849146 +0200
+++ new/src/hotspot/share/oops/oop.hpp	2020-08-25 10:54:40.519840384 +0200
@@ -42,7 +42,6 @@
 
 // Forward declarations.
 class OopClosure;
-class FastScanClosure;
 class FilteringClosure;
 
 class PSPromotionManager;