Remove always-true --harmony-restrictive-declarations flag

src/parsing/parser.cc

Index: src/parsing/parser.cc
diff --git a/src/parsing/parser.cc b/src/parsing/parser.cc
index 2694722d341396bfb75af5c608d97dd6871567e3..fd10dda9649c5dff2fff955dbcbff23f83d8d0e0 100644
--- a/src/parsing/parser.cc
+++ b/src/parsing/parser.cc
@@ -625,8 +625,6 @@ Parser::Parser(ParseInfo* info)
                       info->isolate()->is_tail_call_elimination_enabled());
   set_allow_harmony_do_expressions(FLAG_harmony_do_expressions);
   set_allow_harmony_function_sent(FLAG_harmony_function_sent);
-  set_allow_harmony_restrictive_declarations(
-      FLAG_harmony_restrictive_declarations);
   set_allow_harmony_async_await(FLAG_harmony_async_await);
   set_allow_harmony_restrictive_generators(FLAG_harmony_restrictive_generators);
   set_allow_harmony_trailing_commas(FLAG_harmony_trailing_commas);
@@ -3277,7 +3275,6 @@ PreParser::PreParseResult Parser::ParseFunctionBodyWithPreParser(
     SET_ALLOW(natives);
     SET_ALLOW(harmony_do_expressions);
     SET_ALLOW(harmony_function_sent);
-    SET_ALLOW(harmony_restrictive_declarations);
     SET_ALLOW(harmony_async_await);
     SET_ALLOW(harmony_trailing_commas);
     SET_ALLOW(harmony_class_fields);