Remove uses of unittest in the HTML tests where possible.

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

Index: pkg/dev_compiler/test/codegen/lib/html/typed_arrays_simd_test.dart
diff --git a/pkg/dev_compiler/test/codegen/lib/html/typed_arrays_simd_test.dart b/pkg/dev_compiler/test/codegen/lib/html/typed_arrays_simd_test.dart
index 0e3d780f3fb5522a0ca919734b341e3dc41a869a..5de04dd76e017fd90f5cff90c920cd8309015f78 100644
--- a/pkg/dev_compiler/test/codegen/lib/html/typed_arrays_simd_test.dart
+++ b/pkg/dev_compiler/test/codegen/lib/html/typed_arrays_simd_test.dart
@@ -2,12 +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 TypedArraysSimdTest;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
 import 'dart:html';
 import 'dart:typed_data';
 
+import 'package:expect/minitest.dart';
+
 const _FLOATING_POINT_ERROR = 0.0000000001;
 floatEquals(value) => closeTo(value, _FLOATING_POINT_ERROR);
 
@@ -19,8 +18,6 @@ class MyFloat32x4 {
 }
 
 main() {
-  useHtmlConfiguration();
-
   // Only perform tests if ArrayBuffer is supported.
   if (!Platform.supportsTypedData) {
     return;