The Ametys.plugins.cms.search.ContentSearchTool add a bus listener for archived and unarchived event but the listeners are not defined.
The SearchArchivesTool contains the only definition of a method with such a name.

On the other hands, bus event are handled by the EditContentGrid. And the EditContentGrid handles the archived and unarchived event.

All this should be reviewed to remove useless declaration of listener and unsure correct behaviour.