No, I am sure that we never studied it in the Tuesday groups and I do not recall going through it at a Service Meeting, up until I stopped going around 2000.
No explanation was ever given although I recall that we all fancied studying it .
Incidentally, you can find it today still on the “ Watchtower On Line “ site both in the book list and the text of it is there. I could not find it from “search “ though…
[Edit.. There is a chapter on Islam]