Revert "Add warnings about Python 3.5 deprecation in Certbot (#8154)"

This reverts commit 270b5535e2.

acme/acme/__init__.py

@@ -20,11 +20,3 @@ for mod in list(sys.modules):
     # preserved (acme.jose.* is josepy.*)
     if mod == 'josepy' or mod.startswith('josepy.'):
         sys.modules['acme.' + mod.replace('josepy', 'jose', 1)] = sys.modules[mod]
-
-
-if sys.version_info[:2] == (3, 5):
-    warnings.warn(
-            "Python 3.5 support will be dropped in the next release of "
-            "acme. Please upgrade your Python version.",
-            PendingDeprecationWarning,
-    )  # pragma: no cover

certbot/certbot/__init__.py

@@ -1,13 +1,4 @@
 """Certbot client."""
-import warnings
-import sys
 
 # version number like 1.2.3a0, must have at least 2 parts, like 1.2
 __version__ = '1.8.0.dev0'
-
-if sys.version_info[:2] == (3, 5):
-    warnings.warn(
-            "Python 3.5 support will be dropped in the next release of "
-            "certbot. Please upgrade your Python version.",
-            PendingDeprecationWarning,
-    )  # pragma: no cover

certbot/certbot/_internal/main.py

@@ -1343,10 +1343,6 @@ def main(cli_args=None):
         if config.func != plugins_cmd:  # pylint: disable=comparison-with-callable
             raise
 
-    if sys.version_info[:2] == (3, 5):
-        logger.warning("Python 3.5 support will be dropped in the next release "
-                       "of Certbot - please upgrade your Python version.")
-
     set_displayer(config)
 
     # Reporter