PEP 743: Mark as Rejected

[encukou]

• SC/PEP Delegate has formally accepted/rejected the PEP and posted to the Discussions-To thread
• Pull request title in appropriate format (PEP 123: Mark as Accepted)
• Status changed to Accepted/Rejected
• Resolution field points directly to SC/PEP Delegate official acceptance/rejected post, including the date (e.g. `01-Jan-2000 <https://discuss.python.org/t/12345/100>`__)
• Acceptance/rejection notice added, if the SC/PEP delegate had major conditions or comments
• Discussions-To, Post-History and Python-Version up to date

This also removes the PEP-Delegate header as there was no delegation.

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📚 Documentation preview 📚: https://pep-previews--4824.org.readthedocs.build/

[hugovk]

Thank you anyway for your work on this.