fix(storage): fix document of delete blob (#10015)

Author: HemangChothani

storage/google/cloud/storage/blob.py

@@ -546,15 +546,11 @@ def delete(self, client=None):
  :param client: Optional. The client to use. If not passed, falls back
  to the ``client`` stored on the blob's bucket.
 
- :rtype: :class:`Blob`
- :returns: The blob that was just deleted.
  :raises: :class:`google.cloud.exceptions.NotFound`
  (propagated from
  :meth:`google.cloud.storage.bucket.Bucket.delete_blob`).
  """
- return self.bucket.delete_blob(
- self.name, client=client, generation=self.generation
- )
+ self.bucket.delete_blob(self.name, client=client, generation=self.generation)
 
  def _get_transport(self, client):
  """Return the client's transport.