In a typical mini-split, the water flows to the outside unit and exits the system there, so you either have a pump or a sufficiently sloped pipe from the inside unit to the outside unit.
edit: I guess you could route the drain pipe anywhere if you wanted, so I retract my previous statement.
Where do you think it is getting discharged?
Into drains in the parking garage in the case of my building. Though thinking more about it now, it's totally reasonable that other buildings might find it easiest to drain to the outside unit.