EIP-7639 - Prune calldata

EIP-7639, authored by lightclient, proposes that Ethereum execution layer clients stop requesting or serving peer-to-peer block data from before the Paris upgrade, which activated proof of stake. The proposal adds an eth protocol version 70 under which clients must not make or respond to queries about block bodies or receipts before block 15537393. The text states that historical data in clients has grown to around 500 GB, with nearly 400 GB coming from pre-PoS block data. It also notes that nodes would no longer be able to full sync from the devp2p network after activation and would need to retrieve the data out-of-band.