Remove PY38_PLUS and related constants

Author: jacobtylerwalls

doc/user_guide/checkers/features.rst

@@ -687,8 +687,7 @@ Method Args checker Messages
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 :positional-only-arguments-expected (E3102): *`%s()` got some positional-only arguments passed as keyword arguments: %s*
   Emitted when positional-only arguments have been passed as keyword arguments.
-  Remove the keywords for the affected arguments in the function call. This
-  message can't be emitted when using Python < 3.8.
+  Remove the keywords for the affected arguments in the function call.
 :missing-timeout (W3101): *Missing timeout argument for method '%s' can cause your program to hang indefinitely*
   Used when a method needs a 'timeout' parameter in order to avoid waiting for
   a long time. If no timeout is specified explicitly the default value is used.

pylint/checkers/method_args.py

@@ -41,7 +41,6 @@ class MethodArgsChecker(BaseChecker):
             "positional-only-arguments-expected",
             "Emitted when positional-only arguments have been passed as keyword arguments. "
             "Remove the keywords for the affected arguments in the function call.",
-            {"minversion": (3, 8)},
         ),
     }
     options = (

pylint/checkers/utils.py

@@ -1817,10 +1817,7 @@ def is_sys_guard(node: nodes.If) -> bool:
     """Return True if IF stmt is a sys.version_info guard.
 
     >>> import sys
-    >>> if sys.version_info > (3, 8):
-    >>>     from typing import Literal
-    >>> else:
-    >>>     from typing_extensions import Literal
+    >>> from typing import Literal
     """
     if isinstance(node.test, nodes.Compare):
         value = node.test.left

pylint/constants.py

@@ -14,7 +14,6 @@
 from pylint.__pkginfo__ import __version__
 from pylint.typing import MessageTypesFullName
 
-PY38_PLUS = sys.version_info[:2] >= (3, 8)
 PY39_PLUS = sys.version_info[:2] >= (3, 9)
 PY310_PLUS = sys.version_info[:2] >= (3, 10)
 PY311_PLUS = sys.version_info[:2] >= (3, 11)