SMARTS - 10.1.x
./dmctl -s <SAM> invoke ICS_Notificaion::<instance> clear <user> <SourceDomainName>
./dmctl -s <SAM> invoke ICS_NotificationFactory::ICS-NotificationFactory archiveNotification ICS_Notification::<instance> <user> <SourceDomainName>
See Additional Information tab for example.
The following shows how to remove ICS_Notification::NOTIFICATION-Router123_Down from INCHARGE-SA:
dmctl -s INCHARGE-SA get ICS_Notification::NOTIFICATION-Router123_Down | grep SourceDomainName
./dmctl -s INCHARGE-SA invoke ICS_Notification::NOTIFICATION-Router123_Down clear admin INCHARGE-AM
./dmctl -s INCHARGE-SA invoke ICS_NotificationFactory::ICS-NotificationFactory archiveNotification ICS_Notification::NOTIFICATION-Router123_Down admin INCHARGE-AM