chore: remove outdated confirmations documentation

[matthewwalsh0]

Description

Remove outdated confirmations documentation files.

Changelog

CHANGELOG entry: null

Related issues

Manual testing steps

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I've included tests if applicable
• I've documented my code using JSDoc format if applicable
• I've applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

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Note

Low Risk
Low risk documentation-only change; main risk is broken internal doc links (e.g., references to removed docs/confirmations.md).

Overview
Removes several outdated confirmation-related docs, including the confirmation refactoring READMEs and the docs/confirmations.md guide.

No runtime code changes; reviewers should verify any remaining documentation links aren’t now pointing at the deleted files.

^{Written by Cursor Bugbot for commit 0759b1c. This will update automatically on new commits. Configure here.}

[github-actions]

🔍 Smart E2E Test Selection

⏭️ Smart E2E selection skipped - draft PR

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud