[Emergency Bug] Failed to restart node

[roycncn]

In https://github.com/OffchainLabs/nitro/blame/ac929a72699a752a2aa101b99c164d204d5288eb/cmd/nitro/init.go#L378

seems in recent update we involved the checking of unexecpted data, but meanwhile we download the snapshot with some extra data.

That makes the node can't start at all.

[joshuacolvin0]

Please use Arbitrum discord for questions about running node, thanks!