Remove deprecated Expect from the libraries.

tests/language/inline_super_field_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 // Test that source maps use the correct compilation unit when super class
 // fields from another compilation unit are inlined.
 
 library inline_super_field_test;
 
+import 'package:expect/expect.dart';
 import "inline_super_field_lib.dart";
 
 class S {
 }
 
 class C extends S with M1 { }
 
 void main() {
   var c = new C();
   Expect.equals(1, c.bar);
 }