I removed one switch from a three gang switchbox. I simply don't need it. All the wires to that switch have been trimmed and taped off and the same at the opposite end of those wires.
Now, what can I do to finish off the outside of that switch? The simple solution would be to plaster over the vacant third of the box and put a double gang cover on the outside. Am I breaking any codes if I do that? If so what's a decent alternative?
This is in Canada.