How to remove album artwork from my iphone?

Since I listen to music daily in public, I often am listen to music. However certain album covers (i.e. The money store by Death Grips) are kinda risque. If there's someway to remove the artwork I would love to know. It would make public listening so much easier!

Go onto iTunes, right-click on the album, click album info, click on the album cover and press the delete key. (This is the solution for windows, for a Mac solution google it).