Potential fix for code scanning alert no. 14984: Unused import

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Sam O <[email protected]>

Author: soluwalana

tests/collections/llm/gpt/data/test_chat_dataset.py

@@ -14,7 +14,7 @@
 
 import copy
 import json
-import os
+
 import tempfile
 from pathlib import Path
 from unittest.mock import MagicMock, patch