I just get some of that "wire wrap" also called wire loom, and loom all the wires. Gives a neat appearance even if they are not used.
You can also un-solder them, but sometimes this is extremly dificult because all the wires of one color all go to the same spot on the PCB ( all black are together, all red, all yellow, so on )
It is hard to get just the one you want out, but it would be the best way.
The guys in "cases & cooling" would probably know more.