Remove unittest and matcher from the repo.

pkg/matcher/test/operator_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.operator_matchers_test;
-
-import 'package:matcher/matcher.dart';
-import 'package:unittest/unittest.dart' show test, group;
-
-import 'test_utils.dart';
-
-void main() {
-  initUtils();
-
-  test('anyOf', () {
-    // with a list
-    shouldFail(0, anyOf([equals(1), equals(2)]),
-        "Expected: (<1> or <2>) Actual: <0>");
-    shouldPass(1, anyOf([equals(1), equals(2)]));
-
-    // with individual items
-    shouldFail(0, anyOf(equals(1), equals(2)),
-        "Expected: (<1> or <2>) Actual: <0>");
-    shouldPass(1, anyOf(equals(1), equals(2)));
-  });
-
-  test('allOf', () {
-    // with a list
-    shouldPass(1, allOf([lessThan(10), greaterThan(0)]));
-    shouldFail(-1, allOf([lessThan(10), greaterThan(0)]),
-        "Expected: (a value less than <10> and a value greater than <0>) "
-        "Actual: <-1> "
-        "Which: is not a value greater than <0>");
-
-    // with individual items
-    shouldPass(1, allOf(lessThan(10), greaterThan(0)));
-    shouldFail(-1, allOf(lessThan(10), greaterThan(0)),
-        "Expected: (a value less than <10> and a value greater than <0>) "
-        "Actual: <-1> "
-        "Which: is not a value greater than <0>");
-
-    // with maximum items
-    shouldPass(1, allOf(lessThan(10), lessThan(9), lessThan(8), lessThan(7),
-                        lessThan(6), lessThan(5), lessThan(4)));
-    shouldFail(4, allOf(lessThan(10), lessThan(9), lessThan(8), lessThan(7),
-        lessThan(6), lessThan(5), lessThan(4)),
-        "Expected: (a value less than <10> and a value less than <9> and a "
-        "value less than <8> and a value less than <7> and a value less than "
-        "<6> and a value less than <5> and a value less than <4>) "
-        "Actual: <4> "
-        "Which: is not a value less than <4>");
-  });
-
-  test('If the first argument is a List, the rest must be null', () {
-    expect(() => allOf([], 5), throwsArgumentError);
-    expect(() => anyOf([], null, null, null, null, null, 42),
-        throwsArgumentError);
-  });
-}