    link.removeAttr(path, [options])

Remove a previously set attribute from the link. `path` can either be a string that specifies the path to the, possibly nested, attribute to be removed or an array of more paths. The associated link view makes sure the link gets re-rendered properly. If `options` is passed, it can contain data that is passed over to the event listeners for the `change:attrs` event triggered on the link itself and also on the graph the link is in.