Change intl to use new pub layout

pkg/intl/data/dates/localeList.dart

Index: pkg/intl/data/dates/localeList.dart
===================================================================
--- pkg/intl/data/dates/localeList.dart	(revision 12515)
+++ pkg/intl/data/dates/localeList.dart	(working copy)
@@ -1,85 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this sourcecode is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// Hard-coded list of all available locales for dates.
-final availableLocalesForDateFormatting = const ["en_ISO",
-    "af",
-    "am",
-    "ar",
-    "bg",
-    "bn",
-    "ca",
-    "cs",
-    "da",
-    "de",
-    "de_AT",
-    "de_CH",
-    "el",
-    "en",
-    "en_AU",
-    "en_GB",
-    "en_IE",
-    "en_IN",
-    "en_SG",
-    "en_US",
-    "en_ZA",
-    "es",
-    "es_419",
-    "et",
-    "eu",
-    "fa",
-    "fi",
-    "fil",
-    "fr",
-    "fr_CA",
-    "gl",
-    "gsw",
-    "gu",
-    "he",
-    "hi",
-    "hr",
-    "hu",
-    "id",
-    "in",
-    "is",
-    "it",
-    "iw",
-    "ja",
-    "kn",
-    "ko",
-    "ln",
-    "lt",
-    "lv",
-    "ml",
-    "mr",
-    "ms",
-    "mt",
-    "nl",
-    "no",
-    "or",
-    "pl",
-    "pt",
-    "pt_BR",
-    "pt_PT",
-    "ro",
-    "ru",
-    "sk",
-    "sl",
-    "sq",
-    "sr",
-    "sv",
-    "sw",
-    "ta",
-    "te",
-    "th",
-    "tl",
-    "tr",
-    "uk",
-    "ur",
-    "vi",
-    "zh",
-    "zh_CN",
-    "zh_HK",
-    "zh_TW",
-    "zu"];