unnecessary

adj

1. Not needed or necessary.

   “The automatic child-frightener made clowns unnecessary.”

   “Every possible economy was carefully investigated and unnecessary expense, however small, eliminated. The company had no money to spare on "frills."”

   “Robins, of Torquay, had denied a single charge of causing unnecessary suffering to an animal. She claimed the microwave was accidentally turned on by one of the cats after the kitten got inside. But Knutton said the kitten was too small to even get onto the work surface.”

   “Yet some of the statin side effects mentioned in the study have not been proved in the scientific literature or are exaggerated and could cause unnecessary worry, he said.”

2. Done in addition to requirements; unrequired.