diff -r f0312c7d5b37 -r ba6c248cae19 src/hotspot/cpu/aarch64/globals_aarch64.hpp
--- a/src/hotspot/cpu/aarch64/globals_aarch64.hpp	Wed Nov 13 11:21:15 2019 +0100
+++ b/src/hotspot/cpu/aarch64/globals_aarch64.hpp	Wed Nov 13 11:37:29 2019 +0100
@@ -64,9 +64,6 @@
 
 define_pd_global(bool, PreserveFramePointer, false);
 
-// GC Ergo Flags
-define_pd_global(uintx, CMSYoungGenPerWorker, 64*M);  // default max size of CMS young gen, per GC worker thread
-
 define_pd_global(uintx, TypeProfileLevel, 111);
 
 define_pd_global(bool, CompactStrings, true);