RFC: remove block API

[alanshaw]

Everything we can do with the block API we can do with the DAG API, and the DAG API prevents us from putting invalid data in IPFS.

[daviddias]

Not quite. Blocks are raw binary blobs and it is what Bitswap (the Block Exchange) understands to trade data. It just so happens that as a user, you pretty much don't have any reason to use the Block API unless you don't want to use IPLD at all.

[alanshaw]

👍 understood - could it be a private API that JS IPFS uses internally or is there something that necessitates it being public?

[daviddias]

I would guess that most of the users won't need it. If we learn that having that available is hurting UX/DX of the APIs, that it can make sense to hide/disable it.