Tentative: account_peppol notification layout debranding

[bjornbillen]

The account_peppol module adds a specific inheritance to the notification layout, claiming that the invoice is being sent to Peppol (or wasn't able to send it to Peppol) from Odoo. Another thing to possibly debrand?

[github-actions]

There hasn't been any activity on this issue in the past 6 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days.
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