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Adjective: superfluous  soo'pur-floo-us
  1. Serving no useful purpose; having no excuse for being
    "superfluous lines in a play";
    - otiose, pointless, purposeless, senseless, wasted
  2. More than is needed, desired, or required
    "delete superfluous (or unnecessary) words";
    - excess, extra, redundant, spare, supererogatory, supernumerary, surplus

See also: unnecessary, unneeded, worthless

Encyclopedia: Superfluous