No, he is important.
From what I have gathered from the books,
he told no one but Harry and Dumbledore.

Voldemort probably wants to know what happened that day in the graveyard, and why the wands connected in that way. With Olivander's knowledge, Voldemort might hope to enhance his wand somehow.

Knowing this, Harry should probably do the same. Whoever finds Olivander first gets the prize.