Dropping a tradeskillFollow

I tried looking through the forum, but couldn't find the answer. I am right now lvl 7 on my alt and I have one profession already for my crafting. I accidently took leathercrafting instead of skinning for my other profession and now I can't seem to get rid of the leathercrafting. There is no option to untrain when I either talk to the leathercrafter or when I open up the leathercrafting window. I do not have the option to train skinning as it is grayed out. How do I get rid of the unwanted profession?
Thanks.