Has anyone removed the door bell button assembly?
Yes, quite a number of us have removed it.
With size of hole, go into any box store and find a plug to fit the hole.
The door bell mechanism can be a real fire hazard, as it works by the door bell button closing the circuit. Water getting into the button assembly can hold the magnet ON and hold it ON long enough that it overheats.
Does the assembly just pul out through the hole?
Yes.
Fingernail or perhaps feeler gauge.
I replaced with a lighted one, really cool at night
Chris
I pulled it , replaced the button on amazon and fused power feed with one amp fuse in case it sticks. Works great and everyone loves ringing it...
Another reasonable alternative.
Lynn ordered a brass escutcheon door bell button. It's cool having a door bell on a motorhome. Especially for that 3:00 AM wake up call where you now have the opportunity to answer the door "Can't you read? Use the door bell."
To avoid any fire hazard I removed the doorbell assembly from the upper cabinet above the door. I left the outside button in place in case I ever came up with another use for it. I found a nice placard online to place above the button: