On the left-hand side under 'Edit this tutorial' is an option to delete the tutorial. Do you not see this? If not, it's either something Tom has forgotten to add, or it may just be allowed for mods only.
Either way, if you wish, just post your request (with links) here and I'll remove it/them for you.
Thank you for your fast reply.
No, I do not see such a button.
Please, delete this tutorial for me.