Prune the old deploy code. This CL does a few changes:

pkg/polymer/lib/safe_html.dart

-// Copyright (c) 2011, 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.
-
-// TODO(sigmund): move this library to a shared package? or make part of
-// dart:html?
-library polymer.safe_html;
-
-/** Declares a string that is a well-formed HTML fragment. */
-class SafeHtml {
-
-  /** Underlying html string. */
-  final String _html;
-
-  // TODO(sigmund): provide a constructor that does html validation
-  SafeHtml.unsafe(this._html);
-
-  String toString() => _html;
-
-  operator ==(other) => other is SafeHtml && _html == other._html;
-  int get hashCode => _html.hashCode;
-}
-
-/**
- * Declares a string that is safe to use in a Uri attribute, such as `<a href=`,
- * to avoid cross-site scripting (XSS) attacks.
- */
-class SafeUri {
-  final String _uri;
-
-  // TODO(sigmund): provide a constructor that takes or creates a Uri and
-  // validates that it is safe (not a javascript: scheme, for example)
-  SafeUri.unsafe(this._uri);
-
-  String toString() => _uri;
-
-  operator ==(other) => other is SafeUri && _uri == other._uri;
-  int get hashCode => _uri.hashCode;
-}