chore: Remove maintenance header

[kusssal]

List of changes

• Removed Next Step: Treasury Withdrawal based on your feedback has been submitted from the header

Checklist

• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the changelog
• I have added tests that prove my fix is effective or that my feature works

[mesudip]

Looks good