(dispense with someone/something) to no longer use someone or something because you no longer want or need themdispense with the formalities (=to not do things usually done in a social situation in order to do something more important immediately): I think we all know each other, so we can dispense with the formalities.
dispense with someone’s services (=stop employing them): We have reluctantly decided to dispense with Porter’s services after a series of poor results.