hAbuMustafa on "[Plugin: Jetpack by WordPress.com] Unlink few blogs from wordpress.com account"

Hello,
My website had been removed by the web host.
It's kind of messy in my dashboard with all these all old permanently-deleted websites, so I wanted to delete them which I can't do because those site are unavailable anymore, So, how can I remove them?
Those I want to delete:
http://www.khawatery.cu.cc
http://mini.khawatery.cu.cc
http://diary.khawatery.cu.cc
http://myblackbox.khawatery.cu.cc

http://wordpress.org/plugins/jetpack/