Remove experimental flags that are now required

test/mjsunit/packed-elements.js

Index: test/mjsunit/packed-elements.js
diff --git a/test/mjsunit/packed-elements.js b/test/mjsunit/packed-elements.js
index 4a873730643990cf47d0047f6f2d18eb73e0b177..3ce92d1186b5178a7794767433097d0f6710983d 100644
--- a/test/mjsunit/packed-elements.js
+++ b/test/mjsunit/packed-elements.js
@@ -25,9 +25,7 @@
 // (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: --allow-natives-syntax --smi-only-arrays --packed-arrays
-
-var has_packed_elements = !%HasFastHoleyElements(Array());
+// Flags: --allow-natives-syntax
 
 function test1() {
   var a = Array(8);
@@ -101,11 +99,9 @@ function test_with_optimization(f) {
   for (i = 0; i < 25000; ++i) f(); // Make sure GC happens
 }
 
-if (has_packed_elements) {
-  test_with_optimization(test1);
-  test_with_optimization(test2);
-  test_with_optimization(test3);
-  test_with_optimization(test4);
-  test_with_optimization(test5);
-  test_with_optimization(test6);
-}
+test_with_optimization(test1);
+test_with_optimization(test2);
+test_with_optimization(test3);
+test_with_optimization(test4);
+test_with_optimization(test5);
+test_with_optimization(test6);