In Kanban mode, on the Storyboard screen, we can interact on a card in order to make the action "Assign me".
It could be very interesting to also be able to unassign everybody on the card.
Why ? Because it corresponds to the Kanban flow: remove people on a card means this card can be pull in the next flow step.
What we do actually: click on the card option "Assign", remove everybody in, and save.
During a meeting, it could be painful to do so a lots of time, for each card.