The online field level help for the L Delete command says :
" Use this option to DELETE a userid or profile from the list. Enter the 'L'
next to the name of the entry you wish to delete. To verify delete, you
must overtype the name with YES and blank the rest of the field. This
option will delete the PDS member associated with the user id or profile
selected. For CA Top Secret users, when a profile is selected for
deletion, this profile acid will be deleted, and any associations for
existing users of this profile will be severed. "
What you actually need to do, is when you get the "Verify DELETE with Y or YES" message, tab back down to the userid you want to delete, re-enter the L command next to the userid and overtype the name with YES and blank to the end of the name field, then hit enter, and it will return with <ERASED> next to the userid.