http://bugs.winehq.org/show_bug.cgi?id=10602
--- Comment #3 from Luke Bratch l_bratch@yahoo.co.uk 2009-06-10 12:39:13 --- It seems that it can't be done from the mailman interface, the files must be removed directly:
http://wiki.list.org/pages/viewpage.action?pageId=4030681