chore: Remove debug meta decodable V9 checks

[github-actions]

Note

The pull request "chore: Remove debug meta decodable V9 checks" was created by @noahsmartin but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

Removes one more v9 check for a codable class. Already added this to changelog in a previous PR that copied it from the V9 changelog.

#skip-changelog

[linear]

COCOA-780