MIDI params are ignored

[jqueraltmo]

There are a few MIDI-related parameters in generate-params.hs that are not working (they are not used by SuperDirt).

They are dur, modwheel, expression and sustainpedal.

There are other ways to achieve the intended effects (dur -> sustain, modwheel -> ccn 1, expression -> ccn 11 (may depend on the device), sustainpedal -> ccn 64 (may depend on the device)), so probably the best solution is to simply get rid of those parameters.

[telephon]

Why not alias these to the respective implementation?