WHO CUT DOWN THE GIANT TREES?

Our forgotten history, who cut down the giant trees…Did God command the angels to cut them down so none would survive the flood? Why would the Book of Enoch be removed from our Bible yet remains in other countries? What don’t they want us to know?
Enoch 66:2 Now then shall the angels labor at the trees; but when they proceed to this, I will put my hand upon it, and preserve it.