superfluous

comparative more superfluous · superlative most superfluous

1. In excess of what is required or sufficient.

   With a full rain suit, carrying an umbrella may be superfluous.

   2 more examples

   Then I began to play in timid fashion, venturing only twenty or thirty gulden at a time. Meanwhile, I observed and took notes. It seemed to me that calculation was superfluous, and by no means possessed of the importance which certain other players attached to it, even though they sat with ruled papers in their hands, whereon they set down the coups, calculated the chances, reckoned, staked, and—lost exactly as we more simple mortals did who played without any reckoning at all.

   1867, Fyodor Dostoyevsky, chapter IV, in The Gambler, translated by C. J. Hogarth^(https://en.wikisource.org/wiki/The_Gambler_(1867)/IV)

   This did not mean that the party was superfluous, however. The concept of an advance guard of the proletariat was a sound one; but it should be a group of active members, not a sovereign body.

   1978 [1976], Leszek Kołakowski, translated by P[aul] S[teven] Falla, Main Currents of Marxism, volume II: The Golden Age, Oxford: Clarendon Press, translation of Główne nurty marksizmu: rozwój (in Polish), →ISBN, →OCLC, page 84

   Synonyms: de trop, dispensible, excessive, excrescent, extra, extraneous, extravagant, pleonastic