--- old/src/hotspot/share/runtime/globals.hpp	2018-09-07 13:38:43.295077075 -0700
+++ new/src/hotspot/share/runtime/globals.hpp	2018-09-07 13:38:43.031077085 -0700
@@ -841,9 +841,6 @@
                 "The check is performed on GuaranteedSafepointInterval.")   \
                 range(0, 100)                                               \
                                                                             \
-  experimental(intx, SyncFlags, 0, "(Unsafe, Unstable) "                    \
-               "Experimental Sync flags")                                   \
-                                                                            \
   experimental(intx, SyncVerbose, 0, "(Unstable)")                          \
                                                                             \
   experimental(intx, hashCode, 5,                                           \