This fact per se is not enough 1984, but the reason of that, end especially the power standing at the very beginning of that reasoning is certainly like that.
1984 describes the practice of retroactively editing publication to erase facts from history.
Wikipedia is retroactively scrubbing not only articles but also their discussion and their editing history to erase facts that are thought to be inconvenient.
If this doesn't sound 1984-esque I don't know what does.