Avoid duplicated imports.

dart/tests/compiler/dart2js/begin_end_token_test.dart

Index: dart/tests/compiler/dart2js/begin_end_token_test.dart
diff --git a/dart/tests/compiler/dart2js/begin_end_token_test.dart b/dart/tests/compiler/dart2js/begin_end_token_test.dart
index 21239827918046ad73ad24249c479b3a9a104286..954213e6c7e9eae8c6f8f7feac94bdc8dc863599 100644
--- a/dart/tests/compiler/dart2js/begin_end_token_test.dart
+++ b/dart/tests/compiler/dart2js/begin_end_token_test.dart
@@ -2,10 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#import('parser_helper.dart');
-#import("../../../lib/compiler/implementation/scanner/scannerlib.dart");
-#import("../../../lib/compiler/implementation/tree/tree.dart");
-
+import 'parser_helper.dart';
+import '../../../lib/compiler/implementation/tree/tree.dart';
 
 void testNode(Node node, String expected, String text, [bool hard = true]) {
   var debug = 'text=$text,expected=$expected,node:${node}';