Mark stub-only private symbols as @type_check_only in third-party stubs (#14545)

stubs/setuptools/setuptools/command/editable_wheel.pyi

@@ -77,4 +77,3 @@ class _NamespaceInstaller(namespaces.Installer):
 
 class InformationOnly(SetuptoolsWarning): ...
 class LinksNotSupported(errors.FileError): ...
-class _DebuggingTips(SetuptoolsWarning): ...

stubs/setuptools/setuptools/config/pyprojecttoml.pyi

@@ -4,7 +4,6 @@ from typing import Any
 from typing_extensions import Self
 
 from ..dist import Distribution
-from ..warnings import SetuptoolsWarning
 from . import expand
 
 def load_file(filepath: StrPath) -> dict[Incomplete, Incomplete]: ...
@@ -45,6 +44,3 @@ class _EnsurePackagesDiscovered(expand.EnsurePackagesDiscovered):
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, traceback: TracebackType | None
     ) -> None: ...
-
-class _BetaConfiguration(SetuptoolsWarning): ...
-class _InvalidFile(SetuptoolsWarning): ...