[stable2407] Backport #7437

[paritytech-cmd-bot-polkadot-sdk]

Backport #7437 into stable2407 from serban300.

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[github-actions]

This pull request is amending an existing release. Please proceed with extreme caution,
as to not impact downstream teams that rely on the stability of it. Some things to consider:

• Backports are only for 'patch' or 'minor' changes. No 'major' or other breaking change.
• Should be a legit fix for some bug, not adding tons of new features.
• Must either be already audited or trivial (not sure audit).

Emergency Bypass

If you really need to bypass this check: add validate: false to each crate
in the Prdoc where a breaking change is introduced. This will release a new major
version of that crate and all its reverse dependencies and basically break the release.

[EgorPopelyaev]

@serban300 Is prdoc needed for this pr?

[serban300]

@serban300 Is prdoc needed for this pr?

@EgorPopelyaev no, I don't think so. We're just removing a structure that is private and unused

[gui1117]

To be more exact it is a removal of inner dead code.

[ggwpez]

Ah, got confused with the MRs. We need more CI to copy these files...

[serban300]

@ggwpez so is the prdoc needed ? Even if we're just removing dead code ? If so I can add it to the other backports as well