Triggers after album photo is deleted.
~~~
<?php
function my_component_init(){
ossn_register_callback('delete', 'album:photo', 'my_component_cb');
}
function my_component_cb($callback, $type, array $params){
// $params['photo'] contains the (array) of Files Object
}
ossn_register_callback('ossn', 'init', 'my_component_init');
~~~
