--- old/src/hotspot/share/gc/serial/serial_globals.hpp	2020-04-05 21:35:06.418515112 -0700
+++ new/src/hotspot/share/gc/serial/serial_globals.hpp	2020-04-05 21:35:06.074502163 -0700
@@ -25,18 +25,5 @@
 #ifndef SHARE_GC_SERIAL_SERIAL_GLOBALS_HPP
 #define SHARE_GC_SERIAL_SERIAL_GLOBALS_HPP
 
-#define GC_SERIAL_FLAGS(develop,                                            \
-                        develop_pd,                                         \
-                        product,                                            \
-                        product_pd,                                         \
-                        diagnostic,                                         \
-                        diagnostic_pd,                                      \
-                        experimental,                                       \
-                        notproduct,                                         \
-                        manageable,                                         \
-                        product_rw,                                         \
-                        lp64_product,                                       \
-                        range,                                              \
-                        constraint)
 
 #endif // SHARE_GC_SERIAL_SERIAL_GLOBALS_HPP