Rework axes/__init__.pyi to not use __all__

Author: ksunden

lib/matplotlib/axes/__init__.pyi

@@ -1,16 +1,13 @@
-__all__ = [
-    'Axes',
-    'Subplot',
-    'SubplotBase',
-]
-
 from typing import TypeVar
 
-from ._axes import *
-from ._axes import Axes as Subplot
+from ._axes import Axes as Axes
+
 
 _T = TypeVar("_T")
 
+# Backcompat.
+Subplot = Axes
+
 class _SubplotBaseMeta(type):
     def __instancecheck__(self, obj) -> bool: ...
 

lib/matplotlib/axes/_base.pyi

@@ -131,7 +131,6 @@ class _AxesBase(martist.Artist):
     def clear(self) -> None: ...
     def cla(self) -> None: ...
 
-    # Could be made generic, but comments indicate it may be temporary anyway
     class ArtistList(Sequence[_T]):
         def __init__(
             self,