Or is this just a cosmetic thing and they removed it from the files but kept it in a separate license file?
"The copyright and license notice is already in the LICENSE file. There is no justifiable reason to also require that it be included in every file, since the individual files are not individually distributed except as part of the entire package."
Maybe the person who removed the copyright was a node contributor?
Heh, maybe its the same person who put the copyright at the top of every file in the first place.
(I have no idea, just a guess)
Or is this just a cosmetic thing and they removed it from the files but kept it in a separate license file?