Remove barback from the repo.

pkg/barback/test/too_many_open_files_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.too_many_open_files_test;
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:barback/barback.dart';
-import 'package:path/path.dart' as pathos;
-import 'package:unittest/unittest.dart';
-
-import 'utils.dart';
-
-main() {
-  initConfig();
-
-  test("handles many simultaneous asset read() calls", () {
-    runOnManyFiles((asset) => asset.read().toList());
-  });
-
-  test("handles many simultaneous asset readToString() calls", () {
-    runOnManyFiles((asset) => asset.readAsString());
-  });
-}
-
-runOnManyFiles(Future assetHandler(Asset asset)) {
-  // Make a text file in a temp directory.
-  var tempDir = Directory.systemTemp.createTempSync("barback").path;
-  var filePath = pathos.join(tempDir, "out.txt");
-
-  // Make sure it's large enough to not be read in a single chunk.
-  var contents = new StringBuffer();
-  for (var i = 0; i < 1024; i++) {
-    contents.write(
-        "this is a sixty four character long string that describes itself");
-  }
-
-  new File(filePath).writeAsStringSync(contents.toString());
-
-  var id = new AssetId("myapp", "out.txt");
-
-  // Create a large number of assets, larger than the file descriptor limit
-  // of most machines and start reading from all of them.
-  var futures = [];
-  for (var i = 0; i < 1000; i++) {
-    var asset = new Asset.fromPath(id, filePath);
-    futures.add(assetHandler(asset));
-  }
-
-  expect(Future.wait(futures).whenComplete(() {
-    new Directory(tempDir).delete(recursive: true);
-  }), completes);
-}