remove path import in example

Author: Max Wang

examples/advanced/dataframe_operations.py

@@ -14,10 +14,6 @@
 
 import sys
 import uuid
-from pathlib import Path
-
-# Uncomment to run from local source instead of installed package
-# sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "src"))
 
 import pandas as pd
 from azure.identity import InteractiveBrowserCredential