Clean up README.md and note deletions

[josemvidal]

Removed unnecessary lines and added a note about deletions.

[josemvidal]

@codex check this

[chatgpt-codex-connector]

To use Codex here, create an environment for this repo.

[Copilot]

Pull Request Overview

This PR cleans up the README by removing extraneous placeholder lines and adds a note indicating deletions.

• Remove multiple placeholder lines in README
• Add a note about the deletions

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_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The note 'I deleted some stuff above.' is informal and not helpful to readers of the README. Consider removing it or replacing it with a concise, user-focused description such as 'Removed obsolete placeholder sections above.' or omit entirely since commit history already records deletions.

Suggested change

I deleted some stuff above.