Drop unused author field from pubspec (#93)

diff --git a/pubspec.yaml b/pubspec.yaml
index e472203..d015b9f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,7 +2,6 @@
 version: 2.4.1-dev
 
 description: Utility functions and classes related to the 'dart:async' library.
-author: Dart Team <misc@dartlang.org>
 homepage: https://www.github.com/dart-lang/async
 
 environment: