Remove unused os import from settings.py

[innacampo]

Description

Related Issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

Changes Made

Testing

• Added/updated unit tests
• Ran full test suite (python3 -m pytest tests/ -v)
• Manual testing performed

Checklist

• Code follows project style guidelines
• Self-reviewed my code
• Commented hard-to-understand areas
• Updated documentation (if needed)
• No new warnings introduced
• Tests pass locally
• Any dependent changes have been merged

Screenshots (if applicable)