Removing AM24N tuner from DirecTV satellite receiver

I have an AM24N, over-the-air tuner, which has been in my DirecTV circuit for years. In fact, nobody at "Technical Help" even knows what I'm talking about. I removed my AM24N since I really no longer need it. Now, with everything disconnected and removed my receiver keeps telling me it has been removed and needs to be replaced. The message stays on my screen until it times out. As I said, nobody seems to know what I'm talking about when I mention the AM24N. This AM24N was provided by DirecTV back before the "SPOT BEAM" era began. I'm guessing about 15 to 20 years back. If anybody knows anything about the AM24N please reply.