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

test/mjsunit/es6/regress/regress-513474.js

Index: test/mjsunit/es6/regress/regress-513474.js
diff --git a/test/mjsunit/harmony/regress/regress-513474.js b/test/mjsunit/es6/regress/regress-513474.js
similarity index 85%
rename from test/mjsunit/harmony/regress/regress-513474.js
rename to test/mjsunit/es6/regress/regress-513474.js
index ec4bc84a30e25dc31e75194e8f351dea62cdab2c..98a052c54922cde1a6c193b38ffc60303b8f45ed 100644
--- a/test/mjsunit/harmony/regress/regress-513474.js
+++ b/test/mjsunit/es6/regress/regress-513474.js
@@ -2,6 +2,4 @@
 // 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(...a) { function f() { eval() } })();