GH-554 remove null-check for clientProperties

[akefirad]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

Remove the null-check of clientProperties.

💡 Motivation and Context

The variable is nullable.

💚 How did you test it?

N/A

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• I updated reference documentation to reflect the change
• All tests passing
• No breaking changes

🔮 Next steps

[maciejwalkowiak]

Thanks @akefirad!