scripts/clang-tools: remove unused module

Remove unused imported 'os' module.
Signed-off-by: yangxingwu <xingwu.yang@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

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

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