remove deprecated (and not used mail_certfile and mail_keyfile)

src/eduid/common/config/workers.py

@@ -19,9 +19,7 @@ class MsgConfig(WorkerConfig):
 
     audit: bool = True
     devel_mode: bool = False
-    mail_certfile: str = ""
     mail_host: str = "localhost"
-    mail_keyfile: str = ""
     mail_password: str = ""
     mail_port: int = 25
     mail_starttls: bool = False

src/eduid/workers/msg/tasks.py

@@ -2,6 +2,7 @@
 import logging
 import smtplib
 from collections import OrderedDict
+from ssl import SSLContext
 from typing import Any, Optional
 
 from celery import Task
@@ -55,10 +56,7 @@ def smtp(self) -> smtplib.SMTP:
         config = MsgCelerySingleton.worker_config
         _smtp = smtplib.SMTP(config.mail_host, config.mail_port)
         if config.mail_starttls:
-            if config.mail_keyfile and config.mail_certfile:
-                _smtp.starttls(config.mail_keyfile, config.mail_certfile)
-            else:
-                _smtp.starttls()
+            _smtp.starttls()
         if config.mail_username and config.mail_password:
             _smtp.login(config.mail_username, config.mail_password)
         return _smtp