Remove redundant docstring
Remove redundant docstring

The method is quite simple and it doesn't need a dostring.
Also existing docstring was incorrect. The name of the expected
parameter is 'name', not 'node'. And it cannot be an object
of the type node.StorageNode

Change-Id: I94124d327c490d45eae4d2ded218beadfbc33ad7

openstack/watcher,stackforge/watcher,openstack/watcher,stackforge/watcher