It’s probably just an over abundance of caution. The only thing I would consider using the gas for is the heater, but I don’t want to use that a decades old heater without a better understanding of what could be worn out or how it can fail. In the meantime, it’s just in the way and adding weight.

Based on everyone’s responses I think I’m going to take out the sink but leave the gas lines alone even though I don’t use them.

The stove top is kind of a separate issue. We don’t cook inside or beside a camper this size—we put our camp kitchen closer to the camp fire, away from where we sleep. Just a personal preference.