Or just use some mostly-opaque tape, such as masking tape or brown cellulose tape (which is what I remember using on one obnoxious external hard drive many years ago) and add more layers to dim it.

Or use a black permanent marker.

A great many households will already have one or the other of these already.

But I presume that none of these would particularly serve the purpose of the article, allowing infrared signals to pass through. Can’t say I’ve encountered the combination of a bright LED and infrared receiver, myself.