Remove --harmony-exponentiation-operator flag

test/mjsunit/es7/exponentiation-operator.js

Index: test/mjsunit/es7/exponentiation-operator.js
diff --git a/test/mjsunit/harmony/exponentiation-operator.js b/test/mjsunit/es7/exponentiation-operator.js
similarity index 99%
rename from test/mjsunit/harmony/exponentiation-operator.js
rename to test/mjsunit/es7/exponentiation-operator.js
index 543e1046c9946c0efa7f5600f484d220600a4f3e..9d934bdaac52218c659c0808f0d960bf7876cb81 100644
--- a/test/mjsunit/harmony/exponentiation-operator.js
+++ b/test/mjsunit/es7/exponentiation-operator.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-exponentiation-operator
-
 function TestBasic() {
   assertEquals(-(8 ** 2), -64);
   assertEquals(+(8 ** 2), 64);