Sorry, but at this level people don't make multi billion dollar decisions for spite. Also, "told to leave the board" doesn't mean anything - he's either voted out or not. He was previously kicked out as CEO, someone else is in charge, and he obviously doesn't believe leaving his capital there is a good use of his money.
I would think at his level it would be the opposite. He has FU money. They did kick him out of the company he made. Maybe he wants to tell Uber something.
