Sorry, you cannot remove that user. You have to go back.
<%* else %>Warning! You are about to remove <%= encode_html ($editor->{First_Name}) %> <%= encode_html ($editor->{Family_Name}) %> from the database.
Are you sure that you don't want to cancel the removal and instead use the modify option to disallow logins for <%= encode_html ($editor->{First_Name}) %> <%= encode_html ($editor->{Family_Name}) %>?
Editors that are removed are also removed from document metadata - once removed they will not be credited as creators or contributors for any documents on the site.
Editors that are dissallowed from loging into the web site cannot create or modify documents but they do remain credited as document creators and contributors.
<%* end-if %>