Deletes a bucket.
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
This method deletes the bucket currently selected by Bucket. Note that, for some service provider, bucket names share a global namespace, and it may not be possible to recreate a deleted bucket if its name has been taken by another user in the meantime. Refer to a provider's documentation for more information.