diff -r f0312c7d5b37 -r ba6c248cae19 src/hotspot/share/runtime/globals.hpp
--- a/src/hotspot/share/runtime/globals.hpp	Wed Nov 13 11:21:15 2019 +0100
+++ b/src/hotspot/share/runtime/globals.hpp	Wed Nov 13 11:37:29 2019 +0100
@@ -1947,9 +1947,6 @@
   experimental(bool, UseCriticalCompilerThreadPriority, false,              \
           "Compiler thread(s) run at critical scheduling priority")         \
                                                                             \
-  experimental(bool, UseCriticalCMSThreadPriority, false,                   \
-          "ConcurrentMarkSweep thread runs at critical scheduling priority")\
-                                                                            \
   develop(intx, NewCodeParameter,      0,                                   \
           "Testing Only: Create a dedicated integer parameter before "      \
           "putback")                                                        \