In central admin, no. The site collection owners should still have access to everything even if permissions are removed. Whoever is listed as either of the 2 owners of the site collection in Central Admin's Site Collection Administrators link has the ability to delete the subsite with no permissions.

You can temporarily set yourself as one of the listed users and delete the subsite.

Delete a subsite in central admin, no. The site collection owners should still have access to everything even if permissions are removed. Whoever is listed as either of the 2 owners of the site collection in Central Admin's Site Collection Administrators link has the ability to delete the subsite with no permissions.

You can temporarily set yourself as one of the listed users and delete the subsite.