It was a movement that attempted to achieve clarity and elegance by omitting the unnecessary -- and the article discusses whether omitting formally-unnecessary

It was a movement that attempted to achieve clarity and elegance by omitting the unnecessary -- and the article discusses whether omitting formally-unnecessary features like var or const makes for more clarity and elegance, or less. (Having said which, I notice that there's a reply from the person who actually wrote the article, and it doesn't say that. But that's why he should have made the reference :-).)