As JSquared said, his eligibility (or lack thereof) was never in question. Pre-existing scores are not eligible at the Tonys, ever. If there's ever any doubt, it's because of the percentage of the original vs. pre-existing material. But in this case, it's all pre-existing, so there was no need for the committee to make a statement on it.
I don't mean to be snarky, but is there any particular reason you thought it might be eligible?