chore: drop unused os import in round 6 audit driver

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: druvus

bin/audit_examples_scale.py

@@ -21,7 +21,6 @@
 
 import argparse
 import logging
-import os
 import shutil
 import subprocess
 import sys