Eliminate old style import from language tests

tests/language/intrinsified_methods_test.dart

Index: tests/language/intrinsified_methods_test.dart
===================================================================
--- tests/language/intrinsified_methods_test.dart	(revision 15598)
+++ tests/language/intrinsified_methods_test.dart	(working copy)
@@ -3,8 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // Dart test program for testing the instanceof operation.
 
-#library('intrinsified_methods_test');
-#import('dart:math');
+library intrinsified_methods_test;
+import 'dart:math';
 
 testIsNegative() {
   Expect.isFalse((12.0).isNegative);