No, I consider it a religious practice though and it is associated with religion in many cases.

There are so many forms of Yoga, like Japa yoga, Natya Yoga etc, that as a term it is not particularly specific, but these last two examples are Mantra and Dance yoga, both associated with deities. So while I would not say Yoga is a religion, it does have origin in religion and also plays key roles in specific religions.

I consider those beliefs religious, the idea something is sacred, spiritual, the use of a practice, believing that practice informs about the universe and or enlightens etc. To me those are all religious beliefs, far more so to me than belief in an invisible man in the sky, so to speak. I suppose from my perspective belief in a practice as spiritual is far more religious than belief in a deity or ontological claim.