scripts/clang-tools: remove unused module

Remove unused imported 'os' module.

Signed-off-by: yangxingwu <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>

Author: yangxingwu

scripts/clang-tools/run-clang-tools.py

@@ -12,7 +12,6 @@
 import argparse
 import json
 import multiprocessing
-import os
 import subprocess
 import sys