fix (docs): remove warning for storage bucket existence.

Before 0.9.0 it was not possible to create a bucket using the library,
so it had to be done by other means.
Starting from 0.9.0 it is possible, so we can remove this warning.

README.md

@@ -78,8 +78,6 @@ dataset.get(dataset.key(['Product', 'Computer']), function(err, entity) {
 
 [Google Cloud Storage][cloud-storage] ([docs][cloud-storage-docs]) allows you to store data on Google infrastructure with very high reliability, performance and availability, and can be used to distribute large data objects to users via direct download.
 
-If you don't have a bucket already, follow the steps of the [Creating a Bucket guide][cloud-storage-create-bucket] to learn how to create your own.
-
 See the [gcloud-node Storage API documentation][gcloud-storage-docs] to learn how to connect to Cloud Storage using this library.
 
 ```js

lib/index.js

@@ -175,12 +175,6 @@ gcloud.pubsub = function(config) {
  * [Google Cloud Storage API docs]{@link https://developers.google.com/storage/}
  * for more information.
  *
- * You need to create a Google Cloud Storage bucket to use this client
- * library.
- * Follow the steps on
- * [Google Cloud Storage docs]{@link https://developers.google.com/storage/}
- * to create a bucket.
-
  * @type {module:storage}
  *
  * @return {module:storage}