[cleanup] Remove unused code in pylint.checker.base following refactor

pylint/checkers/base/__init__.py

@@ -2,7 +2,6 @@
 # For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
 # Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
 
-"""Basic checker for Python code."""
 
 __all__ = [
     "NameChecker",
@@ -17,8 +16,6 @@
 
 from typing import TYPE_CHECKING
 
-from astroid import nodes
-
 from pylint.checkers.base.basic_checker import BasicChecker
 from pylint.checkers.base.basic_error_checker import BasicErrorChecker
 from pylint.checkers.base.comparison_checker import ComparisonChecker
@@ -39,36 +36,6 @@
     from pylint.lint import PyLinter
 
 
-UNITTEST_CASE = "unittest.case"
-
-
-LOOPLIKE_NODES = (
-    nodes.For,
-    nodes.ListComp,
-    nodes.SetComp,
-    nodes.DictComp,
-    nodes.GeneratorExp,
-)
-
-
-def in_loop(node: nodes.NodeNG) -> bool:
-    """Return whether the node is inside a kind of for loop."""
-    return any(isinstance(parent, LOOPLIKE_NODES) for parent in node.node_ancestors())
-
-
-def in_nested_list(nested_list, obj):
-    """Return true if the object is an element of <nested_list> or of a nested
-    list
-    """
-    for elmt in nested_list:
-        if isinstance(elmt, (list, tuple)):
-            if in_nested_list(elmt, obj):
-                return True
-        elif elmt == obj:
-            return True
-    return False
-
-
 def register(linter: "PyLinter") -> None:
     linter.register_checker(BasicErrorChecker(linter))
     linter.register_checker(BasicChecker(linter))

pylint/checkers/base/basic_checker.py

@@ -2,7 +2,7 @@
 # For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
 # Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
 
-"""Permits separating multiple checks with the same checker name into classes/file."""
+"""Basic checker for Python code."""
 
 import collections
 import itertools
@@ -30,6 +30,8 @@
 
 
 class _BasicChecker(BaseChecker):
+    """Permits separating multiple checks with the same checker name into classes/file."""
+
     __implements__ = IAstroidChecker
     name = "basic"