Remove stale references to --harmony-arrays flag in mjsunit tests

Also move those tests from mjsunit/harmony to mjsunit/es6.

R=littledan@chromium.org

Review URL: https://codereview.chromium.org/1403633007

Cr-Commit-Position: refs/heads/master@{#31314}

test/mjsunit/es6/array-copywithin.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-arrays
-
 (function copyWithinArity() {
   assertEquals(Array.prototype.copyWithin.length, 2);
 })();

test/mjsunit/es6/array-fill.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-arrays
-
 assertEquals(1, Array.prototype.fill.length);
 
 assertArrayEquals([].fill(8), []);

test/mjsunit/es6/array-find.js

@@ -25,8 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --harmony-arrays
-
 assertEquals(1, Array.prototype.find.length);
 
 var a = [21, 22, 23, 24];

test/mjsunit/es6/array-findindex.js

@@ -25,8 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --harmony-arrays
-
 assertEquals(1, Array.prototype.findIndex.length);
 
 var a = [21, 22, 23, 24];

test/mjsunit/es6/array-from.js

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-arrays
 (function() {
 
 assertEquals(1, Array.from.length);

test/mjsunit/es6/array-of.js

@@ -4,8 +4,6 @@
 
 // Based on Mozilla Array.of() tests at http://dxr.mozilla.org/mozilla-central/source/js/src/jit-test/tests/collections
 
-// Flags: --harmony-arrays
-
 
 
 // Array.of makes real arrays.