(adjective) outmoded old-fashioned / (adjective) incapacitated or disqualified for active duty by advanced age / (adjective) older than the typical member of a specified group / (verb) to make, declare, or prove obsolete or out-of-date / (verb) to retire and pension because of age or infirmity / (verb) to become retired / (verb) to become antiquated
“Sleeveless errand” is superannuated slang for a fool’s errand, or fruitless endeavor.