You see, after you submit something, there will appear various things to choose and click and stuff, and at the end there's a button wich is submit print. If you don't want to sell them, don't click there. At the top, click view deviation (or something like that xD) and done! That's for new deviations, to remove the print status, you have to go to "manage prints" then to "your products" and then select the deviations you don't want to sell and click the button below, i think it was "deactivate print" or something like that xD
I hope it helped! n__n

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YAOI fan!