fix/remove missing bots

I cleaned rumble there were a couple bots which my client cannot download. But there were a couple which report "an invalid robot or team". I have no clue what it means but I tend to blame my client, since they are downloadable and there were some relatively fresh pairing (month old) for them. But I removed them anyway, since de facto I am the only one persistently running battles.

I did not change anything in melee, since, right not, it looks like every bot have a pairing wiht another one.

Awesome, thanks for taking care of this, Beaming!