Respond to a custom menu deletion.
This hook is used to notify modules that a custom menu along with all links contained in it (if any) has been deleted. Contributed modules may use the information to perform actions based on the information entered into the menu system.
$menu: An array representing a custom menu:
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
function hook_menu_delete($menu) {
// Delete the record from our variable.
$my_menus = variable_get('my_module_menus', array());
unset($my_menus[$menu['menu_name']]);
variable_set('my_module_menus', $my_menus);
}