Urf champion select fix

People don't like random champions in urf and people don't like the same champions over and over in urf, so here is a fix.

Make it blind pick with no bans, but the last 2 champions played by everyone are automatically banned. For example, my 2 most recently played champions played in any game mode are Taric and Poppy, so those 2 champions are banned for everyone in the next urf game. This means that there are 2-20 banned champions every game with the most popular champions like being banned most of the time.