Remove get_all_certs_keys() from Apache and Nginx (#3768)

- Remove get_all_certs_keys() implementation in
    - certbot-apache/certbot_apache/configurator.py
- Remove corresponding tests for get_all_certs_keys() in
    - certbot-apache/certbot_apache/tests/configurator_test.py
- Remove get_all_certs_keys() implementation in
    - certbot-nginx/certbot_nginx/configurator.py
    - certbot-nginx/certbot_nginx/parser.py
- Remove corresponding tests for get_all_certs_keys() in:
    - certbot-nginx/certbot_nginx/tests/configurator_test.py
    - certbot-nginx/certbot_nginx/tests/parser_test.py

Resolves #3762

certbot-apache/certbot_apache/configurator.py

@@ -1494,38 +1494,6 @@ class ApacheConfigurator(augeas_configurator.AugeasConfigurator):
 
         return redirects
 
-    def get_all_certs_keys(self):
-        """Find all existing keys, certs from configuration.
-
-        Retrieve all certs and keys set in VirtualHosts on the Apache server
-
-        :returns: list of tuples with form [(cert, key, path)]
-            cert - str path to certificate file
-            key - str path to associated key file
-            path - File path to configuration file.
-        :rtype: list
-
-        """
-        c_k = set()
-
-        for vhost in self.vhosts:
-            if vhost.ssl:
-                cert_path = self.parser.find_dir(
-                    "SSLCertificateFile", None,
-                    start=vhost.path, exclude=False)
-                key_path = self.parser.find_dir(
-                    "SSLCertificateKeyFile", None,
-                    start=vhost.path, exclude=False)
-
-                if cert_path and key_path:
-                    cert = os.path.abspath(self.parser.get_arg(cert_path[-1]))
-                    key = os.path.abspath(self.parser.get_arg(key_path[-1]))
-                    c_k.add((cert, key, get_file_path(cert_path[-1])))
-                else:
-                    logger.warning(
-                        "Invalid VirtualHost configuration - %s", vhost.filep)
-        return c_k
-
     def is_site_enabled(self, avail_fp):
         """Checks to see if the given site is enabled.
 

certbot-apache/certbot_apache/tests/configurator_test.py

@@ -775,21 +775,6 @@ class MultipleVhostsTest(util.ApacheTest):
         self.assertRaises(errors.MisconfigurationError,
                           self.config.config_test)
 
-    def test_get_all_certs_keys(self):
-        c_k = self.config.get_all_certs_keys()
-        self.assertEqual(len(c_k), 3)
-        cert, key, path = next(iter(c_k))
-        self.assertTrue("cert" in cert)
-        self.assertTrue("key" in key)
-        self.assertTrue("default-ssl" in path or "ocsp-ssl" in path)
-
-    def test_get_all_certs_keys_malformed_conf(self):
-        self.config.parser.find_dir = mock.Mock(
-            side_effect=[["path"], [], ["path"], [], ["path"], []])
-        c_k = self.config.get_all_certs_keys()
-
-        self.assertFalse(c_k)
-
     def test_more_info(self):
         self.assertTrue(self.config.more_info())