Manually delete websites from piwik

General questions
1

Hello,
Is there a way to manually delete unnused websites from piwik. Based on my experience there is no way to do this from the Admin Dashboard. Myabe there is a way to the things properly from the database ?
Thank you!

2

Is there a way to manually delete unnused websites from piwik.

You can delete websites with the Websites manager: http://piwik.org/docs/manage-websites/