Updated the return value of getMagicNumber to return 3.

[manuelsblanco]

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Description

In this commit, the following changes were made:

• Deleted the declaration of the unused final variable finalField.
• Removed the line of code that initialized finalField with the value "FINAL."

Motivation and Context

These changes were made to clean up the codebase and remove unnecessary code.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[titusfortner]

seems good to me

[diemol]

Thank you, @manuelsblanco!