Remove comms display in hud

Removes the comms display in the hud for now, and adds structure for it to be re-added when VO is in. @BrettASwift @kadst43 
I was thinking that since each VO could have a different character image associated with it, and that the corresponding sound clips and images are specific to each scenario and what happens in the scenario, that that would be something to be specified in the scenario file as a trigger (or maybe as a starting state param?) . Also, I don't know enough about the sound manager; I would assume that it would only process sounds, but if it will do more that's good too.

In any case, I'll take out this bit and leave that for another PR?