What would you decide what to do with this annoying, and dangerous Mars traveller?

You are on your way to Mars, together with seven others.
It takes six months to get there, and you are three weeks in.
You are all trained and tested (physically, psychologically) and you all have different tasks to do, both in the ship and later on, on Mars.
One person is extremely childish, annoying, controlling, and dangerous (he’s threatening to mess with the dials and stuff).
It was decided that the crew can vote on certain subjects if they arise (75% is the minimum to make a subject/decision pass).
The question is raised to get rid of said person or not.
Bear with me, there is a small air locked door that can be used to eject stuff (20’’ x 20’’)
What’s your personal vote?