WordPress at a glance
action is not described

deleted_blog action-hook . WP 4.8.0

Fires after the site is deleted from the network.

Usage

add_action( 'deleted_blog', 'action_function_name_5143', 10, 2 );
function action_function_name_5143( $blog_id, $drop ){
	// action...
}
$blog_id(int)
The site ID.
$drop(true/false)
True if site's tables should be dropped.
Default: false

Where the hook is called

wpmu_delete_blog()
wp-admin/includes/ms.php 184
do_action( 'deleted_blog', $blog_id, $drop );

Where the hook is used (in WP core)

Does not used.