Can't delete a site from my dashboard

I have closed my account at Hostgator where tothc.com was being hosted and moved all content to spi.us. I'm trying to remove tothc.com from my dashboard but I get this message-

" Something went wrong. We could not log you out from the website.".

I guess maybe it's because the site is no longer there and I'm domain mapping it to another location. Can you assist with removing tothc.com from my dashboard?

Thanks,
Larry