refactor: remove duplicate threading import in _is_interpreter_shutting_down method

- Remove redundant ''import threading'' since threading is already imported at module level
- Addresses reviewer feedback on code duplication
- Maintains all functionality while improving code cleanliness

Co-authored-by: Mervin Praison <MervinPraison@users.noreply.github.com>

Author: github-actions[bot]

src/praisonai-agents/praisonaiagents/telemetry/telemetry.py

@@ -419,7 +419,6 @@ def _is_interpreter_shutting_down(self) -> bool:
         """
         try:
             import sys
-            import threading
 
             # Check if the interpreter is in shutdown mode
             if hasattr(sys, 'is_finalizing') and sys.is_finalizing():