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

test/mjsunit/es6/arrow-rest-params.js

Index: test/mjsunit/es6/arrow-rest-params.js
diff --git a/test/mjsunit/harmony/arrow-rest-params.js b/test/mjsunit/es6/arrow-rest-params.js
similarity index 98%
rename from test/mjsunit/harmony/arrow-rest-params.js
rename to test/mjsunit/es6/arrow-rest-params.js
index 3cb7adf92cdcb8b7235a8cb74878ab17c6f8bfc1..dc25584fe064f6b3cbf2f9b089cc0bed47ee4295 100644
--- a/test/mjsunit/harmony/arrow-rest-params.js
+++ b/test/mjsunit/es6/arrow-rest-params.js
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-rest-parameters
-
 (function testRestIndex() {
   assertEquals(5, ((...args) => args.length)(1,2,3,4,5));
   assertEquals(4, ((a, ...args) => args.length)(1,2,3,4,5));