[test] Test LintDiff Scenario 4

[danieljurek]

See scenario 4 in #32697

Orphan a readme file (delete linked swaggers)

[openapi-pipeline-app]

Next Steps to Merge

Next steps that must be taken to merge this PR:

• ❌ This is the public specs repo main branch which is not intended for iterative development.
  You must acknowledge that you understand that after this PR is merged, you won't be able to stop your changes from being published to Azure customers.
  If this is what you intend, add PublishToCustomers label to your PR.
  Otherwise, retarget this PR onto a feature branch, i.e. with prefix release- (see aka.ms/azsdk/api-versions#release--branches).
• ❌ This PR has at least one change violating Azure versioning policy (label: VersioningReviewRequired).
  To unblock this PR, either a) introduce a new API version with these changes instead of modifying an existing API version, or b) follow the process at aka.ms/brch.
• ❌ The required check named Protected Files has failed. Refer to the check in the PR's 'Checks' tab for details on how to fix it and consult the aka.ms/ci-fix guide

[openapi-pipeline-app]

PR validation pipeline restarted successfully. If there is ApiView generated, it will be updated in this comment.