While not the ideal solution to your needs, I've found that Brasso does a great job of removing logos from electronics with a little elbow grease.

I've used it on my LG television, my Levoit air cleaning machines, and other devices.

My friends laugh when i buy *anything, as the first thing i do is black-marker (i generally only buy black stuff) over any logos. For me, those little flashes of logo are just distracting.

The Apple dongles have no branding on them. Other than their distinctive design language I guess.

Just curious.... why?