pkg/matcher: removed deprecated matchers

pkg/matcher/test/deprecated_matchers_test.dart

-// 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.
-
-library matcher.deprecated_matchers_test;
-
-import 'package:matcher/matcher.dart';
-import 'package:unittest/unittest.dart' show test, group;
-
-import 'test_utils.dart';
-
-void main() {
-  initUtils();
-
-  test('throwsAbstractClassInstantiationError', () {
-    expect(() => new _AbstractClass(), throwsAbstractClassInstantiationError);
-  });
-
-  test('throwsFallThroughError', () {
-    expect(() {
-      var a = 0;
-      switch (a) {
-        case 0:
-          a += 1;
-        case 1:
-          return;
-      }
-    }, throwsFallThroughError);
-  });
-}
-
-abstract class _AbstractClass {
-}