Remove unused imports

unit_test/docker_container_test.py

@@ -1,13 +1,10 @@
-import atexit
 import os
 import platform
 import random
 import shutil
 import subprocess
-import tempfile
 import textwrap
 from pathlib import Path, PurePath, PurePosixPath
-from tabnanny import check
 
 import pytest
 import toml