refactor: declare explicit public API in package __init__ modules

gns3server/utils/__init__.py

@@ -20,9 +20,7 @@ import errno
 import hashlib
 import posixpath
 import re
-import shlex
 import socket
-import sys
 import textwrap
 
 

gns3server/utils/zipfile_zstd/__init__.py

@@ -1,8 +1,5 @@
 # NOTE: this patches the standard zipfile module
 from zipfile import *
 
-from . import _zipfile
-from ._zipfile import (
-    ZIP_ZSTANDARD,
-    ZSTANDARD_VERSION,
-)
+from . import _zipfile  # noqa: F401
+from ._zipfile import ZIP_ZSTANDARD, ZSTANDARD_VERSION  # noqa: F401