Delete --harmony-unicode flag

test/mjsunit/es6/unicode-escapes.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // ES6 extends the \uxxxx escape and also allows \u{xxxxx}.
 
-// Flags: --harmony-unicode
-
 // Unicode escapes in variable names.
 
 (function TestVariableNames1() {
   var foobar = 1;
   assertEquals(foob\u0061r, 1);
   assertEquals(foob\u{0061}r, 1);
   assertEquals(foob\u{61}r, 1);
   assertEquals(foob\u{0000000061}r, 1);
 })();
 
@@ skipping 18 matching lines @@
   assertEquals(s4, "foobar");
 })();
 
 
 (function TestSurrogates() {
   // U+10E6D corresponds to the surrogate pair [U+D803, U+DE6D].
   var s1 = "foo\u{10e6d}";
   var s2 = "foo\u{d803}\u{de6d}";
   assertEquals(s1, s2);
 })();