immaterial

Without material form or substance.

(often followed by `to') lacking importance; not mattering one way or the other.

“whether you choose to do it or not is a matter that is quite immaterial (or indifferent)”

Not consisting of matter.

“immaterial apparitions”

“ghosts and other immaterial entities”

Not pertinent to the matter under consideration.

“the price was immaterial”

Of no importance or relevance especially to a law case.

“an objection that is immaterial after the fact”