ponyeater01LS1

I removed my air fittings and the air compresser and when I did so the check engine light is off now but what do I do with the fittings and there is a little small fitting that was connected towards the back of the intake that was connected to the air and it snakes all the way down towards the passenger side and down by the horn, does anyone know what this is ?? i just pluged it but i have no idea what it is. I am planning on deleting it from the computer within the next 2 weeks. I just cant figure out what this itty bitty hose is its half the size of a pensil diameter??