Remove uses of unittest in the HTML tests where possible.

pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart

Index: pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart b/pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart
index fba6e6161d63108c49bd72866bb24f4673429806..cd60245390a0a5a36613e4d5d9f52c963f79f083 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/touchevent_test.dart
@@ -2,14 +2,11 @@
 // 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 touch_event_test;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 
-main() {
-  useHtmlIndividualConfiguration();
+import 'package:expect/minitest.dart';
 
+main() {
   group('supported', () {
     test('supported', () {
       expect(TouchEvent.supported, true);