Removed support for legacy nvidia cards
We do not provide proprietary driver packages for any nvidia card at the moment, nobody seems interested in testing nvidia drivers at all from what I see in the IRC.
The latest nvidia driver in core seems to package fine but I do not have the hardware to test whether it actually works or not.
For the time being, we should only provide support for the latest proprietary driver.
Further, I do not think we should offer more than one proprietary nvidia driver as those packages are very large, providing more than one would result in the live media being massive in size.