Switch analyzer_cli to 'package:test'.

pkg/analyzer_cli/test/boot_loader_test.dart

Index: pkg/analyzer_cli/test/boot_loader_test.dart
diff --git a/pkg/analyzer_cli/test/boot_loader_test.dart b/pkg/analyzer_cli/test/boot_loader_test.dart
index d24d961f3fa234258e9c1e8c46b203d520907761..30223fbb2b95cdc873f1f64e952a99ca916cb72a 100644
--- a/pkg/analyzer_cli/test/boot_loader_test.dart
+++ b/pkg/analyzer_cli/test/boot_loader_test.dart
@@ -11,7 +11,7 @@ import 'package:analyzer_cli/src/boot_loader.dart';
 import 'package:analyzer_cli/src/driver.dart';
 import 'package:analyzer_cli/src/options.dart';
 import 'package:path/path.dart' as path;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 import 'utils.dart';
 
@@ -43,8 +43,6 @@ main() {
 
   tearDown(() => _tearDown());
 
-  initializeTestEnvironment();
-
   group('Bootloader', () {
     group('plugin processing', () {
       test('bad format', () {