I made a part in my part library. It has several ground pins that are already connected together within the part itself. I named them GND@1, GND@2 and GND@3. I also defined them all as swap level 1. In my schematic and board, I am only using one of the 3 ground pins. But in the board file, there are unrouted airwires between all 3 pins. I don't need traces between them because they are already connected internally. Should I have created my part differently? What's the best way to do something like this? I'm using Eagle 6.5.0 on a Mac.