It's more appropriate to say that it was found to be unnecessary, it wasn't disproven so much as made irrelevant. (Which is to say, there's no evidence against its existence, so much as that there is no longer any evidence -for- its existence.)

More, its presence is still felt in physics. What we call space-time shares the defining characteristic of the luminiferous aether, namely being, in some models' treatments of gravity, a universal transmission medium.

Retracting: This entire line of discussion is pedantry which doesn't actually address the topic at hand, and is way too common on this thread already.