Supernumerary
Part of speech: noun
Definition: A civil designation for somebody who works in a group, association or public office, without forming part of the regular staff; those distinguished from numerary. (For example, supernumerary judges are those who help the regular judges when there is a surplus amount of work.) An extra or walk-on in a film or play; spear-carrier.
Part of speech: adjective
Definition: Extra; beyond the standard or prescribed amount. Greater in number than. Beyond what is necessary.
Unneeded
Part of speech: adjective
Definition: Not needed