Usually, if it's the first time that you hit Edit on the literary work you want to delete it will give you a little checkbox above/near the title of the work that says something like 'Check if you would like to delete this work'. Check that then hit Submit and your work will be deleted. Otherwise, you can delete all the words in it and say 'deleted...' as many people do if they want to clarify that the work has been deleted. Then, after writing something like 'deleted...' ask a moderator or junior mod to lock the topic!
Hope that helped.
-Just
"Just remember there's a difference between stalking people on the internet, and going to their house and cutting their skin off." - Jenna Marbles
~ Yeah I'm letting go of what I had, yeah I'm living now and living loud ~
I've done this before. Every now and then something might get a little glitchy. Usually if you double post, a mod or someone will be there to help clean that up for you if I'm not mistaken. Some people double post on accident and don't even realize it. You can only delete something if no one has yet commented on it. You'll see a little [x] symbol on the upper right hand corner of the post where you can choose to delete if you like. If it's more complicated for some reason or other or you're having trouble with removing posts, contact a mod. They'll be able to help you out.