pkg: analysis aided cleanup

pkg/intl/lib/intl.dart

 // Copyright (c) 2012, 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.
 
 /**
  * This library provides internationalization and localization. This includes
  * message formatting and replacement, date and number formatting and parsing,
  * and utilities for working with Bidirectional text.
  *
  * ## Installing ##
@@ skipping 13 matching lines @@
  * ways of making that data available, which may require importing different
  * libraries. See the class comments for more details.
  *
  * There is also a simple example application that can be found in the
  * `example/basic` directory.
  *
  * [pub]: http://pub.dartlang.org
  */
 library intl;
 
-import 'dart:async';
+import 'dart:collection';
 import 'src/intl_helpers.dart';
 import 'dart:math';
 import 'date_symbols.dart';
 import 'src/date_format_internal.dart';
 import "number_symbols.dart";
 import "number_symbols_data.dart";
 
 part 'date_format.dart';
 part 'src/date_format_field.dart';
 part 'src/date_format_helpers.dart';
@@ skipping 295 matching lines @@
    * unless for some reason this gets called inside a message that resets the
    * locale.
    */
   static String getCurrentLocale() {
     if (_defaultLocale == null) _defaultLocale = systemLocale;
     return _defaultLocale;
   }
 
   toString() => "Intl($locale)";
 }