How to remove a Dove Macsnap on a 128k

Hello everyone! I have recently got an original Macintosh 128k and it came yesterday, when i pull it out, i find that it has a Dove Macsnap expansion, i first thing i though is "how could someone do this to such a awesome machine?!" I have desperately search online, but no luck on how to remove it! now i post here in hope of help to remove it! I want it in it's original 128k state.

I'm aware of the precautions on the High Voltage CRT Display, it needs to be discharged before working on it. But i don't know how to properly remove the upgrade, help please! Thanks

(also, the contrast wheel is a black one, isn't the contrast wheel supposed to be beige like the 512k?)