Remove always-on --harmony-rest-parameters flag

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index b24fbfb3363eb4ead750b6175a964e1d791f65ba..905957b6d92940d90fdd091be7a0dcb93a948ad3 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2102,7 +2102,6 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_array_includes)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_function)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_let)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_rest_parameters)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_default_parameters)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_destructuring_bind)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_destructuring_assignment)
@@ -2633,7 +2632,6 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_sloppy_function_natives[] = {nullptr};
   static const char* harmony_sloppy_let_natives[] = {nullptr};
   static const char* harmony_unicode_regexps_natives[] = {nullptr};
-  static const char* harmony_rest_parameters_natives[] = {nullptr};
   static const char* harmony_default_parameters_natives[] = {nullptr};
   static const char* harmony_reflect_natives[] = {"native harmony-reflect.js",
                                                   nullptr};