fix: chain: Update chain.go

[sectrgt]

Related Issues

lotus chain prune does not execute

Proposed Changes

Added ChainPruneCmd to file

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• All commits have a clear commit message.
• The PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, INTERFACE BREAKING CHANGE, CONSENSUS BREAKING, build, chore, ci, docs,perf, refactor, revert, style, test
  • area: api, chain, state, vm, data transfer, market, mempool, message, block production, multisig, networking, paychan, proving, sealing, wallet, deps
• This PR has tests for new functionality or change in behaviour
• If new user-facing features are introduced, clear usage guidelines and / or documentation updates should be included in https://lotus.filecoin.io or Discussion Tutorials.
• CI is green

[geoff-vball]

@ZenGround0 You're the one who created the chain prune command. Was the exclusion accidental or on purpose?

[magik6k]

Thanks for the PR!

CI complains about generated docs - can you run make docsgen-cli and commit changes?

[sectrgt]

Thanks for the PR!

CI complains about generated docs - can you run make docsgen-cli and commit changes?

Done

[geoff-vball]

@sectrgt Thanks again for the PR :)