Support configuring dart2js from the pubspec.

sdk/lib/_internal/pub/test/transformer/fails_to_load_a_pubspec_with_reserved_transformer_config_test.dart

Index: sdk/lib/_internal/pub/test/transformer/fails_to_load_a_pubspec_with_reserved_transformer_config_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/fails_to_load_a_pubspec_with_reserved_transformer_config_test.dart b/sdk/lib/_internal/pub/test/transformer/fails_to_load_a_pubspec_with_reserved_transformer_config_test.dart
deleted file mode 100644
index 739478486aed700891689879dcef200608f0e6f4..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/transformer/fails_to_load_a_pubspec_with_reserved_transformer_config_test.dart
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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.
-
-library pub_tests;
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-import '../serve/utils.dart';
-
-main() {
-  initConfig();
-
-  integration("fails to load a pubspec with reserved transformer config", () {
-    d.dir(appPath, [
-      d.pubspec({
-        "name": "myapp",
-        "transformers": [{"myapp/src/transformer": {'include': 'something'}}]
-      }),
-      d.dir("lib", [d.dir("src", [
-        d.file("transformer.dart", REWRITE_TRANSFORMER)
-      ])])
-    ]).create();
-
-    createLockFile('myapp', pkg: ['barback']);
-
-    var pub = startPubServe();
-    expect(pub.nextErrLine(), completion(equals('Error in pubspec for package '
-        '"myapp" loaded from pubspec.yaml:')));
-    expect(pub.nextErrLine(), completion(equals('Invalid transformer '
-       'identifier for "transformers.myapp/src/transformer": Transformer '
-       'configuration may not include reserved key "include".')));
-    pub.shouldExit(1);
-  });
-}