In which case, you'd normally want to move it, rather than remove it - as the clock is still ticking down on it, whether it's active in an Organization or not.
I guess you might want to remove and return it (obtain a credit), if it is, for example, at the wrong MX license level - but you'd need to speak to your Meraki account team about that.
If you do want to use it elsewhere, in most instances license moves can be done directly, these days - you wouldn't, as a separate step, remove it first; https://documentation.meraki.com/General_Administration/Licensing/How_to_do_a_License_Transfer_in_Co...