chore: cleanup old migrations and legacy code

[robert-zaremba]

Description

Closes: #XXXX

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Author Checklist

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please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[tac0turtle]

is there a status here? if its not ready or there isn't time to get it reviewed lets close it

[robert-zaremba]

The status is to get feedback. I asked about it in the Discord 2 weeks ago.

[tac0turtle]

The status is to get feedback. I asked about it in the Discord 2 weeks ago.

Lets discuss today on the sdk call. Would love to have consensus on this

[tac0turtle]

in the sdk call we decided not to move forward with this. After framework wg has completed we will revisit this

[robert-zaremba]

No, we decided to leave 0.42+ migrations but to remove the older ones.

[tac0turtle]

closing in favour of #11556, it leaves everything 0.42 and above