What's a nice way to say "fool's errand"?

I have a situation in which i want to say that a particular task i just completed was rather silly, a fool's errand, but i need to phrase it in such a way as it doesn't insult the management team that gave me the task --as they regard it, currently, as vital.

Unnecessary - Not necessary; needless.

Extraneous - Not constituting a vital element or part.

Trivial - Of little significance or value.

How about, "Barking up the wrong tree".

Perhaps quixotic?

hopeful or romantic in a way that is not practical

The implication is that the task is noble, worthy, but unlikely to succeed. It praises the values behind the goal, even if the goal is unattainable (like Dulcinea).

Perhaps you could use the word trivial or superficial?

If you see no value in the task being done than perhaps it is more effective to come up with arguments...