Remove useless pylint error suppression directives (#7657)

As pylint is evolving, it improves its accuracy, and several pylint error suppression (`# pylint: disable=ERROR) added in certbot codebase months or years ago are not needed anymore to make it happy.

There is a (disabled by default) pylint error to detect the useless suppressions (pylint-ception: `useless-suppression`). It is not working perfectly (it has also false-positives ...) but it is a good start to clean the codebase.

This PR removes several of these useless suppressions as detected by the current pylint version we use.

* Remove useless suppress

* Remove useless lines

certbot-compatibility-test/certbot_compatibility_test/configurators/nginx/common.py

@@ -5,7 +5,7 @@ import subprocess
 
 import zope.interface
 
-from acme.magic_typing import Set  # pylint: disable=unused-import, no-name-in-module
+from acme.magic_typing import Set
 from certbot._internal import configuration
 from certbot_compatibility_test import errors
 from certbot_compatibility_test import interfaces

certbot-compatibility-test/certbot_compatibility_test/test_driver.py

@@ -15,8 +15,8 @@ from urllib3.util import connection
 from acme import challenges
 from acme import crypto_util
 from acme import messages
-from acme.magic_typing import List  # pylint: disable=unused-import, no-name-in-module
-from acme.magic_typing import Tuple  # pylint: disable=unused-import, no-name-in-module
+from acme.magic_typing import List
+from acme.magic_typing import Tuple
 from certbot import achallenges
 from certbot import errors as le_errors
 from certbot.tests import acme_util

certbot-compatibility-test/certbot_compatibility_test/validator.py

@@ -4,7 +4,7 @@ import socket
 
 import requests
 import six
-from six.moves import xrange  # pylint: disable=import-error, redefined-builtin
+from six.moves import xrange
 
 from acme import crypto_util
 from acme import errors as acme_errors
@@ -13,7 +13,6 @@ logger = logging.getLogger(__name__)
 
 
 class Validator(object):
-    # pylint: disable=no-self-use
     """Collection of functions to test a live webserver's configuration"""
 
     def certificate(self, cert, name, alt_host=None, port=443):