Remove Expect from core library.

Review URL: https://codereview.chromium.org//12212016

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/yaml@19755 260f80e4-7a28-3924-810f-c04153c831b5

pkgs/yaml/test/yaml_test.dart

diff --git a/pkgs/yaml/test/yaml_test.dart b/pkgs/yaml/test/yaml_test.dart
index 901bd3d..6013dc9 100644
--- a/pkgs/yaml/test/yaml_test.dart
+++ b/pkgs/yaml/test/yaml_test.dart
@@ -4,6 +4,8 @@
 
 library yaml_test;
 
+// TODO(rnystrom): rewrite tests so that they don't need "Expect".
+import "package:expect/expect.dart";
 import 'package:unittest/unittest.dart';
 import 'package:yaml/yaml.dart';
 import 'package:yaml/deep_equals.dart';