Module Eliom_notif.S.Ext module Ext : sig..endval unlisten : ?sitedata:Eliom_common.sitedata -> ([< `Client_process ], [< `Data ]) Eliom_state.Ext.state -> Eliom_notif.S.key -> unitMake a listener stop listening on data key. If this function is called during a request it will be able to determine sitedata by itself, otherwise it needs to be supplied by the caller.