I actually forgot to do this before the event system went permanently live so that's on me.
Anyways this turns off swarmer drones from being able to be picked by the GM system, since right now they're, to put it charitably, poorly balanced and implemented (being super-maint drones is very clunky to me but thats not the main thing).
When the GM system spawns one in, it tends to result in a ghost becoming the drone, then that player essentially never being able to lose due to infinite re-tries and the crew has to fight off drones for the rest of the round or until they or the drone gets bored.
There's been quite a few number of rounds that have devolved due to them so for now it's probably best to turn them off for the time being.
- Remove duplicate pick_random_edge_turf resulting from our simultaneous addition of it (in overmaps PR)
- Disable SSgame_master and SSevent_ticker subystems, we are still using the original events subsystem.
- Disable the game_master implementations as we are not using them.
- Comment out references to SSgame_master since we are not using it (yet?)
- Best practice to avoid holding onto references to the subsystem instances aside from the global variables. (In case of restart/recover etc).
- The reference to GM was entirely unused by any event or meta-event. /datum/game_master would work fine using the global refs.
