Update or delete language tests using obsolete interfaces or default factory

tests/language/interface_factory_test.dart

Index: tests/language/interface_factory_test.dart
===================================================================
--- tests/language/interface_factory_test.dart	(revision 15648)
+++ tests/language/interface_factory_test.dart	(working copy)
@@ -1,69 +0,0 @@
-// Copyright (c) 2012, 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 the two major variations of interface factories work.
-
-// Variant 1.  The factory class implements the interface and provides
-// a default implementation of the interface.
-
-interface Interface1 default DefaultImplementation {
-  // first parameter type 'var' not a subtype of 'int' in default implementation
-  Interface1(var secret); /// static type warning
-  Interface1.named();
-
-  GetSecret();
-}
-
-class DefaultImplementation implements Interface1 {
-  int _secret;
-
-  DefaultImplementation(int this._secret) {}
-  DefaultImplementation.named() : this._secret = 11 {}
-
-  int GetSecret() { return _secret; }
-
-  static testMain() {
-    Expect.equals(7, new Interface1(7).GetSecret());
-    Expect.equals(11, new Interface1.named().GetSecret());
-  }
-}
-
-// Variant 2.  The factory class provides factory constructors for the
-// interface.
-
-interface Interface2 default FactoryProvider {
-  Interface2(var secret);
-  Interface2.named();
-
-  GetSecret();
-}
-
-class SomeImplementation implements Interface2 {
-  String _secret;
-
-  SomeImplementation(String one, String two) : _secret = "${one}${two}" {}
-
-  String GetSecret() { return _secret; }
-}
-
-// Note that FactoryProvider does not implement Interface2.
-class FactoryProvider {
-  factory Interface2(var secret) {
-    return new SomeImplementation(secret, secret);
-  }
-
-  factory Interface2.named() {
-    return new SomeImplementation("Named", "Constructor");
-  }
-
-  static testMain() {
-    Expect.equals("cobracobra", new Interface2("cobra").GetSecret());
-    Expect.equals("NamedConstructor", new Interface2.named().GetSecret());
-  }
-}
-
-main() {
-  DefaultImplementation.testMain();
-  FactoryProvider.testMain();
-}