Remove barback from the repo.

pkg/barback/test/logger_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS 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 barback.test.logger_test;
-
-import 'package:barback/barback.dart';
-import 'package:scheduled_test/scheduled_test.dart';
-
-import 'utils.dart';
-import 'transformer/log.dart';
-
-main() {
-  initConfig();
-
-  test("logs messages from a transformer", () {
-    var transformer = new LogTransformer([
-      "error: This is an error.",
-      "warning: This is a warning.",
-      "info: This is info.",
-      "fine: This is fine."
-    ]);
-    initGraph(["app|foo.txt"], {
-      "app": [[transformer]]
-    });
-
-    updateSources(["app|foo.txt"]);
-    buildShouldLog(LogLevel.ERROR, equals("This is an error."));
-    buildShouldLog(LogLevel.WARNING, equals("This is a warning."));
-    buildShouldLog(LogLevel.INFO, equals("This is info."));
-    buildShouldLog(LogLevel.FINE, equals("This is fine."));
-  });
-
-  test("logs messages from a transformer group", () {
-    var transformer = new LogTransformer([
-      "error: This is an error.",
-      "warning: This is a warning.",
-      "info: This is info.",
-      "fine: This is fine."
-    ]);
-
-    initGraph(["app|foo.txt"], {"app": [
-      [new TransformerGroup([[transformer]])]
-    ]});
-
-    updateSources(["app|foo.txt"]);
-    buildShouldLog(LogLevel.ERROR, equals("This is an error."));
-    buildShouldLog(LogLevel.WARNING, equals("This is a warning."));
-    buildShouldLog(LogLevel.INFO, equals("This is info."));
-    buildShouldLog(LogLevel.FINE, equals("This is fine."));
-  });
-}