Declare GCS client library as Beta. (#2002)

Author: coryan

README.md

@@ -41,15 +41,8 @@ This library supports the following Google Cloud Platform services with clients
 at the [Beta](#versioning) quality level:
 
 - [Google Cloud Bigtable](google/cloud/bigtable/README.md#readme)
-
-This library supports the following Google Cloud Platform services with clients
-at the [Alpha](#versioning) quality level:
-
 - [Google Cloud Storage](google/cloud/storage/README.md#readme)
 
-The libraries in this code base likely do not (yet) cover all the available
-APIs.
-
 ## Table of Contents
 
 - [Requirements](#requirements)

google/cloud/storage/README.md

@@ -11,7 +11,7 @@ client.
 ## Status
 
 This library support Google Cloud Storage at the
-[Alpha](../README.md#versioning) quality level.
+[Beta](../README.md#versioning) quality level.
 
 ## Documentation