You had requested that we only remove "panjanek.pl" from your user list. The only other site you have showing under your user account is for a Jetpack linked site "blog.paylane.com" - here's what I show on your My Blogs page when I logged in under your user account:
The "Across The Board" titled blog on your My Blogs page is the "blog.paylane.com" site and it appears to still be active. Disconnecting this Jetpack-enabled site from your user account will also cause you to lose all the stats tracking you have for that site under:
You will also lose any additional features you might also be using in the Jetpack plugin by disconnecting the site. All the features can be found here:
Let me know if you still want to proceed with disconnecting your site knowing you'll lose your stats tracking and other features that you're currently using.