diff --git a/certbot/certbot/_internal/reporter.py b/certbot/certbot/_internal/reporter.py
index d781f3d9d..64c0fbd6d 100644
--- a/certbot/certbot/_internal/reporter.py
+++ b/certbot/certbot/_internal/reporter.py
@@ -3,10 +3,10 @@ from __future__ import print_function
 
 import collections
 import logging
+import queue
 import sys
 import textwrap
 
-from six.moves import queue  # type: ignore
 import zope.interface
 
 from certbot import interfaces
diff --git a/certbot/certbot/crypto_util.py b/certbot/certbot/crypto_util.py
index 7f712a0f4..f67d95d97 100644
--- a/certbot/certbot/crypto_util.py
+++ b/certbot/certbot/crypto_util.py
@@ -214,7 +214,7 @@ def make_key(bits=1024, key_type="rsa", elliptic_curve=None):
         except TypeError:
             raise errors.Error("Unsupported elliptic curve: {}".format(elliptic_curve))
         except UnsupportedAlgorithm as e:
-            raise six.raise_from(e, errors.Error(str(e)))
+            raise e from errors.Error(str(e))
         _key_pem = _key.private_bytes(
             encoding=Encoding.PEM,
             format=PrivateFormat.TraditionalOpenSSL,
@@ -491,14 +491,9 @@ def _notAfterBefore(cert_path, method):
     reformatted_timestamp = [timestamp[0:4], b"-", timestamp[4:6], b"-",
                              timestamp[6:8], b"T", timestamp[8:10], b":",
                              timestamp[10:12], b":", timestamp[12:]]
-    # pyrfc3339 always uses the type `str`. This means that in Python 2, it
-    # expects str/bytes and in Python 3 it expects its str type or the Python 2
-    # equivalent of the type unicode.
+    # pyrfc3339 always uses the type `str`
     timestamp_bytes = b"".join(reformatted_timestamp)
-    if six.PY3:
-        timestamp_str = timestamp_bytes.decode('ascii')
-    else:
-        timestamp_str = timestamp_bytes
+    timestamp_str = timestamp_bytes.decode('ascii')
     return pyrfc3339.parse(timestamp_str)
 
 
diff --git a/certbot/certbot/display/util.py b/certbot/certbot/display/util.py
index c48454637..9da981892 100644
--- a/certbot/certbot/display/util.py
+++ b/certbot/certbot/display/util.py
@@ -71,7 +71,7 @@ def _wrap_lines(msg):
 def input_with_timeout(prompt=None, timeout=36000.0):
     """Get user input with a timeout.
 
-    Behaves the same as six.moves.input, however, an error is raised if
+    Behaves the same as the builtin input, however, an error is raised if
     a user doesn't answer after timeout seconds. The default timeout
     value was chosen to place it just under 12 hours for users following
     our advice and running Certbot twice a day.
@@ -85,7 +85,7 @@ def input_with_timeout(prompt=None, timeout=36000.0):
     :raises errors.Error if no answer is given before the timeout
 
     """
-    # use of sys.stdin and sys.stdout to mimic six.moves.input based on
+    # use of sys.stdin and sys.stdout to mimic the builtin input based on
     # https://github.com/python/cpython/blob/baf7bb30a02aabde260143136bdf5b3738a1d409/Lib/getpass.py#L129
     if prompt:
         sys.stdout.write(prompt)