Bug Fix: Remove Duplicate aria-sort Declaration in TreeTableHeader Component

[NADIRATIF]

Hi PrimeReact team,

I'd like to propose a bug fix for the TreeTableHeader component that addresses a duplicate property declaration issue.

Issue Description:
The TreeTableHeader.js component currently has a duplicate 'aria-sort' property declaration on lines 325 and 331, causing ESLint "Duplicate declaration" errors. This occurs because both an inline ariaSort variable and the ariaSortData from the getAriaSort() function are being used for the same ARIA attribute.

Current Problematic Code:

// Line 325 - Duplicate declaration
'aria-sort': ariaSort, //TODO: aria-sort is defined here two times (ariaSort, ariaSortData) ?

// Line 331 - Same property redeclared
'aria-sort': ariaSortData,

Proposed Solution:
Remove the duplicate inline declaration and keep only the ariaSortData version which:

• Uses the proper getAriaSort() function
• Includes column sortable state checking
• Provides better accessibility compliance
• Eliminates the ESLint warning

Benefits:

• ✅ Resolves duplicate property error
• ✅ Maintains proper ARIA accessibility attributes
• ✅ Keeps the more robust implementation with sortable validation
• ✅ Improves code quality and reduces redundancy
• ✅ No breaking changes to existing functionality

Files to be modified:

• components/lib/treetable/TreeTableHeader.js (remove duplicate property and unused variable)

This is a straightforward bug fix that improves code quality while maintaining full backward compatibility. I'm ready to submit a PR once I get approval to proceed.

Could you please review this proposal and let me know if you'd like me to move forward with the fix?

Best regards.