[es6] Remove Scanner and Parser flags for harmony_modules

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 311d192f8e694777f48b339bd723369516a4b816..64032dbc99fb918266b6d6662426e74bc8df9226 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -910,7 +910,6 @@ Parser::Parser(ParseInfo* info)
   DCHECK(!info->script().is_null() || info->source_stream() != NULL);
   set_allow_lazy(info->allow_lazy_parsing());
   set_allow_natives(FLAG_allow_natives_syntax || info->is_native());
-  set_allow_harmony_modules(!info->is_native() && FLAG_harmony_modules);
   set_allow_harmony_arrow_functions(FLAG_harmony_arrow_functions);
   set_allow_harmony_sloppy(FLAG_harmony_sloppy);
   set_allow_harmony_sloppy_let(FLAG_harmony_sloppy_let);
@@ -1054,7 +1053,6 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
     bool ok = true;
     int beg_pos = scanner()->location().beg_pos;
     if (info->is_module()) {
-      DCHECK(allow_harmony_modules());
       ParseModuleItemList(body, &ok);
     } else {
       ParseStatementList(body, Token::EOS, &ok);
@@ -4475,7 +4473,6 @@ PreParser::PreParseResult Parser::ParseLazyFunctionBodyWithPreParser(
     reusable_preparser_->set_allow_lazy(true);
 #define SET_ALLOW(name) reusable_preparser_->set_allow_##name(allow_##name());
     SET_ALLOW(natives);
-    SET_ALLOW(harmony_modules);
     SET_ALLOW(harmony_arrow_functions);
     SET_ALLOW(harmony_sloppy);
     SET_ALLOW(harmony_sloppy_let);