unneeded

extraneous nonessential redundant superfluous undesirable useless

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

essential important necessary needed