I believe this example makes more harm than good.
go-ipfs 0.12.0 does not ship with ethereum codec, and when someone tries to open/traverse the DAG it in ANY of our existing IPFS tooling, they get an error:

$ ipfs refs -r bagiacgzah24drzou2jlkixpblbgbg6nxfrasoklzttzoht5hixhxz3rlncyq 
Error: could not choose a decoder: no decoder registered for multicodec code 144 (0x90)

My take: examples should be educational, not confusion-inducing.

Ok to remove it?

cc @mikeal @warpfork @mvdan