Switch analyzer_cli to 'package:test'.

pkg/analyzer_cli/test/embedder_test.dart

Index: pkg/analyzer_cli/test/embedder_test.dart
diff --git a/pkg/analyzer_cli/test/embedder_test.dart b/pkg/analyzer_cli/test/embedder_test.dart
index 93bbaf5c2703f1d2069eb7a556a163911b3a0566..c1c544c6f5b26065ec97be2c73983b8434cfa236 100644
--- a/pkg/analyzer_cli/test/embedder_test.dart
+++ b/pkg/analyzer_cli/test/embedder_test.dart
@@ -8,13 +8,11 @@ import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer_cli/src/driver.dart' show Driver, errorSink, outSink;
 import 'package:path/path.dart' as path;
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 import 'utils.dart';
 
 main() {
-  initializeTestEnvironment();
-
   group('_embedder.yaml', () {
     StringSink savedOutSink, savedErrorSink;
     int savedExitCode;