Remove --harmony-arrow-functions flag

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 4a3bb2c1e8e02c6a01983b903f44a7fa6cf4044d..a7754dba1a861935354ad2be18e793cb650e9f26 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1854,7 +1854,6 @@ void Bootstrapper::ExportExperimentalFromRuntime(Isolate* isolate,
 
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_modules)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_array_includes)
-EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_arrow_functions)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_proxies)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_sloppy_function)
@@ -2554,7 +2553,6 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_modules_natives[] = {nullptr};
   static const char* harmony_regexps_natives[] = {"native harmony-regexp.js",
                                                   nullptr};
-  static const char* harmony_arrow_functions_natives[] = {nullptr};
   static const char* harmony_tostring_natives[] = {"native harmony-tostring.js",
                                                    nullptr};
   static const char* harmony_sloppy_natives[] = {nullptr};