That's true.. Here's what was said about it:
Let's actually READ the quote you cited.
the Council of Bishops could depose him for heresy, for from the moment he becomes a heretic he is not the head or even a member of the Church. The Church would not be, for a moment, obliged to listen to him when he begins to teach a doctrine the Church knows to be a false doctrine, and he would cease to be Pope, being deposed by God Himself.
So, then, what is there to "DEPOSE" if he is no longer the head of the Church? So on the one hand he is deposed by God Himself while, on the other, deposed by the "Council of Bishops". If God has already deposed him, then in what way is the Church deposing him? What's left to depose?
It's quite clear that there's a distinction here and that we're speaking about different kinds of deposition.
We know that no earthly authority, but only God Himself, can depose a pope ... since the pope's authority comes from God. That's why theologians who have dealt with this subject treat of a distinction between deposing the pope authoritatively (taking away his authority) and deposing the pope ministerially or declaratively. In the first case, God takes away his formal authority as pope. In the second case, the Council of Bishops can strip away his material possession of the office.
Also the quote cited the fact that no one is bound to listen to a heretical pope ... again perfectly backing up the John of St. Thomas position and the one adopted by Father Chazal. This quote basically say that BOTH Bellarmine and Cajetan/John of St. Thomas are right in their own way.