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

test/mjsunit/es6/array-find.js

Index: test/mjsunit/es6/array-find.js
diff --git a/test/mjsunit/harmony/array-find.js b/test/mjsunit/es6/array-find.js
similarity index 99%
rename from test/mjsunit/harmony/array-find.js
rename to test/mjsunit/es6/array-find.js
index 44fc78292a81123a9535999717c1085159af9874..5f6ba4226b58e1cc772cd917d668a2f345275b51 100644
--- a/test/mjsunit/harmony/array-find.js
+++ b/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];