roundup-1.4.4, language de:

admin-WEBinterface -> Userlist, 
The last column and Links in it are named "Verbergen"
in the german translation, which means "Hide". 
It appears to me that the link *deletes* a user. 

possible alternatives for that word are:

"Benutzer löschen" = "delete user"
"Benutzer entfernen" = "remove user"

best regards