--- old/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-09-06 11:32:25.391189088 -0400
+++ new/src/share/vm/gc/g1/g1CollectedHeap.hpp	2017-09-06 11:32:25.052789682 -0400
@@ -63,7 +63,6 @@
 class GenerationSpec;
 class G1ParScanThreadState;
 class G1ParScanThreadStateSet;
-class G1KlassScanClosure;
 class G1ParScanThreadState;
 class ObjectClosure;
 class SpaceClosure;