Wiring Bathroom Fan

I'm wiring a new bathroom fan and I have two electrical cables and a three switch outlet on the wall. The first cable contains a red, black, white, and ground. The second cable contains a black, white, and ground. The old bathroom fan had a primary light, night light, plus fan, so both cables were used and each of the fan features (fan, light, nightlight) worked on its own switch (3 switch wall outlet). My new fan does not have a night light, so now I only have 2 features. My understanding is that I now only need one electrical cable - the one with red, black, white, and ground. My understanding is that wiring the new fan with this cable will allow me to control fan and light with separate switches on the wall, and now I'll have one switch that does nothing. However, what should I do with the other cable that I no longer need, just cap off each wire and leave it? Should I also cap off the ground from the unused cable or should I connect that to the other ground wire on the cable I'm using?