--- old/src/hotspot/share/gc/shared/generation.hpp	2020-08-25 10:54:40.367837823 +0200
+++ new/src/hotspot/share/gc/shared/generation.hpp	2020-08-25 10:54:39.823828657 +0200
@@ -56,7 +56,6 @@
 class ContiguousSpace;
 class CompactPoint;
 class OopClosure;
-class FastScanClosure;
 class GenCollectedHeap;
 class GCStats;