fix(airflow_db_cleanup): removing additional "None" iteration upon Da…

[Bechamelle]

Description

Fixes #13569

Checklist

• [X] Please merge this PR for me once it is approved

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[gemini-code-assist[bot]]

Summary of Changes

Hello @Bechamelle, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a minor bug within the Airflow database cleanup script. It refines the DagRun cleaning process by eliminating an erroneous iteration over a None value, which could lead to unexpected behavior or inefficient processing. The change ensures that only valid DAG IDs are processed during the cleanup operation, improving the robustness of the script.

Highlights

• DagRun Cleaning Logic: Removed an unnecessary iteration over None in the list_dags variable during the airflow_db_cleanup process, preventing potential issues or redundant processing.

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