Remove author from pubspec (dart-lang/stream_transform#95)

Upon publish I was notified that this is no longer useful and can be
removed.

pkgs/stream_transform/pubspec.yaml

diff --git a/pkgs/stream_transform/pubspec.yaml b/pkgs/stream_transform/pubspec.yaml
index 9e263e2..5ad672b 100644
--- a/pkgs/stream_transform/pubspec.yaml
+++ b/pkgs/stream_transform/pubspec.yaml
@@ -1,6 +1,5 @@
 name: stream_transform
 description: A collection of utilities to transform and manipulate streams.
-author: Dart Team <misc@dartlang.org>
 homepage: https://www.github.com/dart-lang/stream_transform
 version: 1.1.0