remove get_systemd_os_info (#7526)

Fixes #7500.

CHANGELOG.md

@@ -14,8 +14,9 @@ Certbot adheres to [Semantic Versioning](https://semver.org/).
 * `certbot.plugins.common.TLSSNI01` has been removed.
 * The functions `certbot.client.view_config_changes`,
   `certbot.main.config_changes`,
-  `certbot.plugins.common.Installer.view_config_changes`, and
-  `certbot.reverter.Reverter.view_config_changes` have been removed
+  `certbot.plugins.common.Installer.view_config_changes`,
+  `certbot.reverter.Reverter.view_config_changes`, and
+  `certbot.util.get_systemd_os_info` have been removed
 
 ### Fixed
 

certbot/tests/util_test.py

@@ -510,14 +510,6 @@ class OsInfoTest(unittest.TestCase):
             m_distro.linux_distribution.return_value = ("something", "else")
             self.assertEqual(cbutil.get_os_info(), ("something", "else"))
 
-    @mock.patch("warnings.warn")
-    @mock.patch("certbot.util.distro")
-    @unittest.skipUnless(sys.platform.startswith("linux"), "requires Linux")
-    def test_get_systemd_os_info_deprecation(self, _, mock_warn):
-        import certbot.util as cbutil
-        cbutil.get_systemd_os_info()
-        self.assertTrue(mock_warn.called)
-
     @mock.patch("certbot.util.subprocess.Popen")
     def test_non_systemd_os_info(self, popen_mock):
         import certbot.util as cbutil

certbot/util.py

@@ -13,7 +13,6 @@ import re
 import socket
 import subprocess
 import sys
-import warnings
 
 import configargparse
 import six
@@ -308,19 +307,6 @@ def get_os_info_ua():
         return " ".join(get_python_os_info(pretty=True))
     return os_info
 
-def get_systemd_os_info():
-    """
-    Parse systemd /etc/os-release for distribution information
-
-    :returns: (os_name, os_version)
-    :rtype: `tuple` of `str`
-    """
-
-    warnings.warn(
-        "The get_sytemd_os_like() function is deprecated and will be removed in "
-        "a future release.", DeprecationWarning, stacklevel=2)
-    return get_os_info()[:2]
-
 def get_systemd_os_like():
     """
     Get a list of strings that indicate the distribution likeness to