Remove harmony-strings flag.

test/mjsunit/es6/string-repeat.js

Index: test/mjsunit/es6/string-repeat.js
diff --git a/test/mjsunit/harmony/string-repeat.js b/test/mjsunit/es6/string-repeat.js
similarity index 99%
rename from test/mjsunit/harmony/string-repeat.js
rename to test/mjsunit/es6/string-repeat.js
index 0af74483a0bbe58afd7aa25322eb3cec890ab4da..15caea14f3d788fac865dffc6cda4b42540d94a4 100644
--- a/test/mjsunit/harmony/string-repeat.js
+++ b/test/mjsunit/es6/string-repeat.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-strings
-
 assertEquals("000", String.prototype.repeat.call(0, 3));
 assertEquals("-1-1-1", String.prototype.repeat.call(-1, 3));
 assertEquals("2.12.12.1", String.prototype.repeat.call(2.1, 3));