unrequired

accidental additional avoidable beside the point casual causeless chance dispensable excess exorbitant expendable extraneous extrinsic fortuitous futile gratuitous haphazard inessential irrelevant lavish needless noncompulsory nonessential optional prodigal profuse random redundant supererogatory superfluous surplus uncalled-for uncritical undesirable unessential unneeded useless wanton worthless