Drop unused author field from pubspec (#13)

diff --git a/pubspec.yaml b/pubspec.yaml
index d95db80..b6be43b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,5 @@
 name: shelf_proxy
 version: 0.1.0+8-dev
-author: Dart Team <misc@dartlang.org>
 description: A shelf handler for proxying HTTP requests to another server.
 homepage: https://github.com/dart-lang/shelf_proxy