Disable kernel unit tests.

pkg/kernel/test/type_hashcode_test.dart

-// Copyright (c) 2016, 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:kernel/kernel.dart';
-import 'type_parser.dart';
-import 'type_unification_test.dart' show testCases;
-import 'package:test/test.dart';
-
-void checkHashCodeEquality(DartType type1, DartType type2) {
-  if (type1 == type2 && type1.hashCode != type2.hashCode) {
-    fail('Equal types with different hash codes: $type1 and $type2');
-  }
-}
-
-const int MinimumSmi = -(1 << 30);
-const int MaximumSmi = (1 << 30) - 1;
-
-bool isSmallInteger(int hash) {
-  return MinimumSmi <= hash && hash <= MaximumSmi;
-}
-
-void checkHashCodeRange(DartType type) {
-  int hash = type.hashCode;
-  if (!isSmallInteger(hash)) {
-    fail('Hash code for $type is not a SMI: $hash');
-  }
-}
-
-void main() {
-  for (var testCase in testCases) {
-    test('$testCase', () {
-      var env = new LazyTypeEnvironment();
-      var type1 = env.parse(testCase.type1);
-      var type2 = env.parse(testCase.type2);
-      checkHashCodeEquality(type1, type2);
-      checkHashCodeRange(type1);
-      checkHashCodeRange(type2);
-    });
-  }
-}