Remove harmony-strings flag.

test/mjsunit/es6/string-endswith.js

Index: test/mjsunit/es6/string-endswith.js
diff --git a/test/mjsunit/harmony/string-endswith.js b/test/mjsunit/es6/string-endswith.js
similarity index 99%
rename from test/mjsunit/harmony/string-endswith.js
rename to test/mjsunit/es6/string-endswith.js
index cc76b5fe4e445eb3b5f94dbbd0b1a57faf9997cc..cbf2ed87666bdc981a52cf4943d0500a0b249ecf 100644
--- a/test/mjsunit/harmony/string-endswith.js
+++ b/test/mjsunit/es6/string-endswith.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(1, String.prototype.endsWith.length);
 
 var testString = "Hello World";