Update msal/oauth2cli/oidc.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: ashok672

msal/oauth2cli/oidc.py

@@ -2,7 +2,6 @@
 import base64
 import time
 import secrets
-import string
 import warnings
 import hashlib
 import logging