When one says “drop in” stove, I think of a range unit which is dropped in a hole in the countertop. I consider a built-in stove to be a “slide in” appliance. The drop in range is usually removed (after disconnecting the fuel/power source} by just lifting it up out of the counter. Sometimes there are clips underneath which must be removed. A slide in stove is usually held in position with 4 screws, accessed after the door is removed. After turning the power off at your breaker, slide the stove forward enough to get to the power cable. Disconnect the stove cable and finish removing the stove.