--- a/src/hotspot/share/gc/z/z_globals.hpp	Tue Aug 14 14:08:04 2018 -0700
+++ b/src/hotspot/share/gc/z/z_globals.hpp	Tue Aug 14 18:42:14 2018 -0500
@@ -79,9 +79,6 @@
   diagnostic(bool, ZVerifyForwarding, false,                                \
           "Verify forwarding tables")                                       \
                                                                             \
-  diagnostic(bool, ZSymbolTableUnloading, false,                            \
-          "Unload unused VM symbols")                                       \
-                                                                            \
   diagnostic(bool, ZWeakRoots, true,                                        \
           "Treat JNI WeakGlobalRefs and StringTable as weak roots")         \
                                                                             \