How to edit "Text Message Forwarding" list?

Does anyone know how to remove devices from this list that you no longer use? For example, I wanted to start from scratch on my new MacBook Air, so I reformatted the laptop. Now, on my iPhone 6+, I see Macbook Air and MacBook Air (1). If I format again, I see MacBook Air (2), even though it's still the same Macbook.

Any way to delete or edit this list in any way? Or am I stuck with (1), (2), etc forever?

 

Thanks for the quick response. So far, I've tried logging out, back in, and even completely formatting the iPhone. It's not really a big deal to me as the feature works fine, I just wish there were a way to edit this list down to just the devices I use.