Write a PM to Cairenn or Dolby and tell them the id/link to delete.
It most probaby will be moved to the outdated and discontinued section then.
At best "rename" the addon that needs to be deleted to show "OBSOLETE" or "DO NOT USE ANYMORE" and update it here on esoui with a zip file only containing the folder name of the addon so it will still overwrite the other addon if you accidently install it manually (outdated wont be listed in Minion any longer) but will just do not overwrite the files.