[adjective] [not gradable]If something is needless, it is completely unnecessary.All that needless worrying over what I'd say to him at the party, and he wasn't even there!Needless to say means 'as you would expect', and introduces or is added to a remark giving information which is expected and not surprising.Needless to say, because of the accident he had, he'll be off work for a while.
Meaning of NEEDLESS in English
Cambridge English vocab. Кембриджский английский словарь. 2012