Remove @deprecated features.

pkg/polymer/lib/component_build.dart

Index: pkg/polymer/lib/component_build.dart
diff --git a/pkg/polymer/lib/component_build.dart b/pkg/polymer/lib/component_build.dart
deleted file mode 100644
index cdd08201c3a12204124d6fc1e029032026a60c5a..0000000000000000000000000000000000000000
--- a/pkg/polymer/lib/component_build.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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 is deprecated. Please use `builder.dart` instead. */
-@deprecated
-library build_utils;
-
-import 'dart:async';
-import 'package:meta/meta.dart';
-
-import 'builder.dart' as builder;
-
-/**
- * This function is deprecated. Please use `build` from `builder.dart`
- * instead.
- */
-@deprecated
-Future build(List<String> arguments, List<String> entryPoints,
-    {bool printTime: true, bool shouldPrint: true}) {
-  return builder.build(
-      entryPoints: entryPoints, options: builder.parseOptions(arguments));
-}