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

pkg/polymer/lib/src/info.dart

Index: pkg/polymer/lib/src/info.dart
diff --git a/pkg/polymer/lib/src/info.dart b/pkg/polymer/lib/src/info.dart
index 9a7b530dbc9304b80f28cdfc2988f06d7a108152..e226ba6674ec866f5f9ee809f82b6e2b515e2222 100644
--- a/pkg/polymer/lib/src/info.dart
+++ b/pkg/polymer/lib/src/info.dart
@@ -293,31 +293,19 @@ class UrlInfo {
    * an error message if the url is an absolute url.
    */
   static UrlInfo resolve(String url, UrlInfo inputUrl, Span span,
-      String packageRoot, Messages messages, {bool ignoreAbsolute: false}) {
+      Messages messages, {bool ignoreAbsolute: false}) {
 
     var uri = Uri.parse(url);
-    if (uri.host != '' || (uri.scheme != '' && uri.scheme != 'package')) {
+    if (uri.host != '' || (uri.scheme != '') || path.isAbsolute(url)) {
       if (!ignoreAbsolute) {
         messages.error('absolute paths not allowed here: "$url"', span);
       }
       return null;
     }
 
-    var target;
-    if (url.startsWith('package:')) {
-      target = path.join(packageRoot, url.substring(8));
-    } else if (path.isAbsolute(url)) {
-      if (!ignoreAbsolute) {
-        messages.error('absolute paths not allowed here: "$url"', span);
-      }
-      return null;
-    } else {
-      target = path.join(path.dirname(inputUrl.resolvedPath), url);
-      url = pathToUrl(path.normalize(path.join(
-          path.dirname(inputUrl.url), url)));
-    }
-    target = path.normalize(target);
-
+    var target = path.normalize(
+        path.join(path.dirname(inputUrl.resolvedPath), url));
+    url = pathToUrl(path.normalize(path.join(path.dirname(inputUrl.url), url)));
     return new UrlInfo(url, target, span);
   }