Are you sure? I was taught that it was a topic at the Synodicon of Vetus, along with a number of apocryphal texts, and the only thing really decided there was the inclusion of Revelations as canon.

Nicaea only affirmed the four Gospels truth as writ and voted the Book of Judith into the canon, but didn't exclude anything that was already accepted.

Edit, and adding that one of the sticking points was that Enoch was largely oral tradition at that point, and the copies stored by the Coptic church were probably compiled by Athnasius himself while in exile.

Are you sure? I was taught that it was a topic at the Synodicon of Vetus, along with a number of apocryphal texts, and the only thing really decided there was the inclusion of Revelations as canon.

Nicaea only affirmed the four Gospels truth as writ and voted the Book of Judith into the canon, but didn't exclude anything that was already accepted.