I created a character and initially played around with the RL teeth morphs, but now I've created my own teeth from the Basic Theet

Now even though I upload to the backend this chtacter with no teeth, the non-existent teeth morph are listed as derived content. How can that be ? 

How do I get it out of the structure? I don't want to sell anything that requires add-ons and I definitely don't want to have that in my character if it's not the case at all. I've now erased all morphs from disk because I  want never more to accidentally burn a morph of RL into my chatacter because it seems it's indelible.:crazy: