Revert "Migrating a block of dart 2:"

tests/language/closure_internals_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.
 
 import "package:expect/expect.dart";
 
 class C {
   foo() => 123;
 }
 
 main() {
   var f = new C().foo;
-  var target = f.target; //# 01: compile-time error
-  var self = f.self; //# 02: compile-time error
-  var receiver = f.receiver; //# 03: compile-time error
+  Expect.throws(() => f.target, (e) => e is NoSuchMethodError);
+  Expect.throws(() => f.self, (e) => e is NoSuchMethodError);
+  Expect.throws(() => f.receiver, (e) => e is NoSuchMethodError);
 }