Fix utcnow calls ahead of 3.12 deprecations

duo_openvpn_mozilla/__init__.py

@@ -23,7 +23,6 @@
 import json
 import syslog
 import configparser
-import pytz
 import iamvpnlibrary
 from duo_openvpn_mozilla.duo_auth import DuoAPIAuth
 from duo_openvpn_mozilla.openvpn_credentials import OpenVPNCredentials
@@ -117,8 +116,7 @@ def log(self, summary, details, severity):
             'processid': os.getpid(),
             'severity': severity,
             'processname': sys.argv[0],
-            # Have to use pytz because py2 is terrible here.
-            'timestamp': pytz.timezone('UTC').localize(datetime.datetime.utcnow()).isoformat(),
+            'timestamp': datetime.datetime.now(datetime.timezone.utc).isoformat(),
             'details': details,
             'hostname': socket.getfqdn(),
             'summary': summary,

setup.py

@@ -56,7 +56,6 @@ def _minimal_ext_cmd(cmd):
     install_requires=[
         'iamvpnlibrary>=0.10.0',
         'duo_client>=3.3.0',
-        'pytz',
     ],
     classifiers=[
         "Development Status :: 5 - Production/Stable",

test/unit/test_duo_openvpn.py

@@ -164,7 +164,7 @@ def test_10_log_nosend(self):
     def test_11_log_send(self):
         ''' Test the log method tries to send '''
         datetime_mock = mock.Mock(wraps=datetime.datetime)
-        datetime_mock.utcnow.return_value = datetime.datetime(2020, 12, 25, 13, 14, 15, 123456)
+        datetime_mock.now.return_value = datetime.datetime(2020, 12, 25, 13, 14, 15, 123456, tzinfo=datetime.timezone.utc)
         self.library.event_send = True
         self.library.event_facility = syslog.LOG_LOCAL1
         with mock.patch('syslog.openlog') as mock_openlog, \