Fix map literals from change 17410

Remove any type arguments from map literals
that had one type argument before change 17410.
Review URL: https://codereview.chromium.org//12045024

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17412 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/lib/src/utils.dart b/lib/src/utils.dart
index 085fa2f..85a9f67 100644
--- a/lib/src/utils.dart
+++ b/lib/src/utils.dart
@@ -20,7 +20,7 @@
 /// Convert a URL query string (or `application/x-www-form-urlencoded` body)
 /// into a [Map] from parameter names to values.
 Map<String, String> queryToMap(String queryList) {
-  var map = <String, String>{};
+  var map = {};
   for (var pair in queryList.split("&")) {
     var split = split1(pair, "=");
     if (split.isEmpty) continue;