--- old/src/hotspot/share/gc/shared/gc_globals.hpp	2020-01-30 17:10:58.802404913 +0100
+++ new/src/hotspot/share/gc/shared/gc_globals.hpp	2020-01-30 17:10:57.826390936 +0100
@@ -315,10 +315,6 @@
   develop(uintx, PromotionFailureALotInterval, 5,                           \
           "Total collections between promotion failures a lot")             \
                                                                             \
-  diagnostic(bool, UseOWSTTaskTerminator, true,                             \
-          "Use Optimized Work Stealing Threads task termination "           \
-          "protocol")                                                       \
-                                                                            \
   experimental(uintx, WorkStealingSleepMillis, 1,                           \
           "Sleep time when sleep is used for yields")                       \
                                                                             \