use Axes instead of Self

Author: randolf-scholz

lib/matplotlib/axes/_base.pyi

@@ -4,6 +4,7 @@ import datetime
 from collections.abc import Callable, Iterable, Iterator, Sequence
 from matplotlib import cbook
 from matplotlib.artist import Artist
+from matplotlib.axes import Axes
 from matplotlib.axis import XAxis, YAxis, Tick
 from matplotlib.backend_bases import RendererBase, MouseButton, MouseEvent
 from matplotlib.cbook import CallbackRegistry
@@ -27,7 +28,6 @@ from cycler import Cycler
 import numpy as np
 from numpy.typing import ArrayLike
 from typing import Any, Literal, TypeVar, overload
-from typing_extensions import Self
 from matplotlib.typing import ColorType
 
 _T = TypeVar("_T", bound=Artist)
@@ -385,8 +385,8 @@ class _AxesBase(martist.Artist):
         bbox_extra_artists: Sequence[Artist] | None = ...,
         for_layout_only: bool = ...
     ) -> Bbox | None: ...
-    def twinx(self) -> Self: ...
-    def twiny(self) -> Self: ...
+    def twinx(self) -> Axes: ...
+    def twiny(self) -> Axes: ...
     def get_shared_x_axes(self) -> cbook.GrouperView: ...
     def get_shared_y_axes(self) -> cbook.GrouperView: ...
     def label_outer(self, remove_inner_ticks: bool = ...) -> None: ...