Remove Expect from core library.

tests/language/named_parameters_passing_falsy_test.dart

 // Copyright (c) 2011, 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.
 
+import "package:expect/expect.dart";
+
 // Dart test program for testing named parameters with various values that might
 // be implemented as 'falsy' values in a JavaScript implementation.
 
 
 class TestClass {
   TestClass();
 
   method([value = 100]) => value;
   method2({value: 100}) => value;
 
@@ skipping 31 matching lines @@
     Expect.equals(v, TestClass.staticMethod2(value: v));
     Expect.equals(v, globalMethod(v));
     Expect.equals(v, globalMethod2(value: v));
   }
 
   // Test via indirect call.
   testFunction(obj.method, obj.method2);
   testFunction(TestClass.staticMethod, TestClass.staticMethod2);
   testFunction(globalMethod, globalMethod2);
 }