No worries, just follow the same steps to list a product in the shop, but this time delete all of the text you entered previously. When you submit the product with no text, the listing is deleted.
You will see that the previous text is still there should you ever go back into that screen again but that's just our system remembering the last thing that was there, just in case you ever want to list the product intentionally later.
http://www.e-junkie.com/ej/help.promote.htm
