How do I remove inactive sites from my Akismet dashboard?

When you visit your Akismet Dashboard, you’ll notice that we now show a list of active sites for your account. This list shows sites that have been active in the last 14 days, so if you recently deactivated Akismet on a site, it may continue to show in the list.  There’s not currently a mechanism to remove sites from this list, once the site hits 15 days of inactivity it will be removed from the list.