Deleted input of `flights_per_year` from acXML

Deleted input of flights_per_year from acXML

Description

I parameter 'flights_per_year' was read from acXML but not used in code, so it was deleted.

Related Issue(s)

N/A

Other Changes

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Screenshots/Logs

I got the following results.

Testing Instructions

1. Take the attached acXML and run the new code. I got the above mentioned results. UNICADO-SMR-180-TF.xml

Developer Checklist

• Code has been tested locally and/or in pipeline.
• (if applicable) documentation updated.
• (if applicable) impact of new dependencies reviewed and included in project.
• Merge conflicts resolved with the target branch.

Additional Notes

N/A