Use `types.NoneType` (#12659)

sphinx/builders/__init__.py

@@ -38,7 +38,6 @@ if TYPE_CHECKING:
     from sphinx.config import Config
     from sphinx.events import EventManager
     from sphinx.util.tags import Tags
-    from sphinx.util.typing import NoneType
 
 
 logger = logging.getLogger(__name__)
@@ -645,7 +644,7 @@ class Builder:
         progress = status_iterator(chunks, __('writing output... '), "darkgreen",
                                    len(chunks), self.app.verbosity)
 
-        def on_chunk_done(args: list[tuple[str, NoneType]], result: NoneType) -> None:
+        def on_chunk_done(args: list[tuple[str, nodes.document]], result: None) -> None:
             next(progress)
 
         self.app.phase = BuildPhase.RESOLVING

sphinx/config.py

@@ -15,7 +15,6 @@ from sphinx.errors import ConfigError, ExtensionError
 from sphinx.locale import _, __
 from sphinx.util import logging
 from sphinx.util.osutil import fs_encoding
-from sphinx.util.typing import ExtensionMetadata, NoneType
 
 if sys.version_info >= (3, 11):
     from contextlib import chdir
@@ -30,7 +29,7 @@ if TYPE_CHECKING:
     from sphinx.application import Sphinx
     from sphinx.environment import BuildEnvironment
     from sphinx.util.tags import Tags
-    from sphinx.util.typing import _ExtensionSetupFunc
+    from sphinx.util.typing import ExtensionMetadata, _ExtensionSetupFunc
 
 logger = logging.getLogger(__name__)
 
@@ -250,7 +249,7 @@ class Config:
         'rst_epilog': _Opt(None, 'env', frozenset((str,))),
         'rst_prolog': _Opt(None, 'env', frozenset((str,))),
         'trim_doctest_flags': _Opt(True, 'env', ()),
-        'primary_domain': _Opt('py', 'env', frozenset((NoneType,))),
+        'primary_domain': _Opt('py', 'env', frozenset((types.NoneType,))),
         'needs_sphinx': _Opt(None, '', frozenset((str,))),
         'needs_extensions': _Opt({}, '', ()),
         'manpages_url': _Opt(None, 'env', ()),
@@ -261,7 +260,7 @@ class Config:
         'numfig_secnum_depth': _Opt(1, 'env', ()),
         'numfig_format': _Opt({}, 'env', ()),  # will be initialized in init_numfig_format()
         'maximum_signature_line_length': _Opt(
-            None, 'env', frozenset((int, NoneType))),
+            None, 'env', frozenset((int, types.NoneType))),
         'math_number_all': _Opt(False, 'env', ()),
         'math_eqref_format': _Opt(None, 'env', frozenset((str,))),
         'math_numfig': _Opt(True, 'env', ()),

sphinx/util/typing.py

@@ -83,9 +83,6 @@ def is_invalid_builtin_class(obj: Any) -> bool:
 # Text like nodes which are initialized with text and rawsource
 TextlikeNode: TypeAlias = nodes.Text | nodes.TextElement
 
-# type of None
-NoneType: TypeAlias = type(None)  # type: ignore[no-redef]
-
 # path matcher
 PathMatcher: TypeAlias = Callable[[str], bool]
 
@@ -237,7 +234,7 @@ def restify(cls: Any, mode: _RestifyMode = 'fully-qualified-except-typing') -> s
         raise ValueError(msg)
 
     # things that are not types
-    if cls is None or cls == NoneType:
+    if cls is None or cls == types.NoneType:
         return ':py:obj:`None`'
     if cls is Ellipsis:
         return '...'
@@ -397,7 +394,7 @@ def stringify_annotation(
         raise ValueError(msg)
 
     # things that are not types
-    if annotation is None or annotation == NoneType:
+    if annotation is None or annotation == types.NoneType:
         return 'None'
     if annotation is Ellipsis:
         return '...'