One issue : when i remove dashlet rss feed on existing user ( he erlier customize own dashbord and add rss) He see: Web Script Status 404 - Not Found The Web Script /share/service/components/dashlets/rssfeed has responded with a status of 404 - Not Found.
How remove information about this dashlet in user config before i completely delete dashlet (i don't want display errors in place where dashlet was