Permit me to explain why the rig’s manufacturer was required to put in a CO/propane alarm. It is to save your life. Fire isn’t the only hazard you face in the small enclosed space of an RV. A small propane leak in the right place can fill you RV with an explosive level of propane in a short time, an hour perhaps. The odorant used to make it stink has the side effect of numbing the nerves in your nose so it is quite easy to reach explosive levels without your smelling it, and when you light the stove or flip the wrong switch, your whole rig explodes like a bomb.
A spider or wasp nest of just the right size and placement in the burner tube of your fridge, water heater, furnace, or even stove can result in bad combustion that fills your rig with poison gas. Because the enclosed space is small, it doesn’t take much to kill you.
So please do not even think of just removing that alarm. The life you save just might be your own.