The element with id = comment:description was changed from an h3 in Trac to an h5 in Bloodhound, and the Genshi stream filter is matching an h3, so the delete button does not appear in Bloodhound. The ticket comment delete button also does not display.
Warning No events reported for defect: Ticket delete buttons don't appear when tracopt.ticket.deleter is enabled (new) in the last 30 days since Mar 31, 2017. This may happen if system is not configured correctly. Please contact your administrator if you think this is the case.