remove __base__ explaination in the object.rst and stdtypes.rst

Author: furkanonder

Doc/c-api/object.rst

@@ -307,49 +307,6 @@ Object Protocol
    class, are considered classes.  However, objects can override this by having
    a :attr:`~class.__bases__` attribute (which must be a tuple of base classes).
 
-   Another function, :attr:`__base__` that is specific to CPython and also
-   exists in Jython and PyPy can also be used on a class inheriting from one
-   or more classes. When such a class takes arguments in the correct order,
-   then starting leftmost.
-
-   Let's look at the example cases;
-
-   >>> class A(object): pass
-   ...
-   >>> class B(A): pass
-   ...
-   >>> class C(int): pass
-   ...
-
-   The first user-defined class that either inherits from the instance
-   of a built-in type other than object or inherits from another user
-   defined class (single or multiple inheritance) that does so or in the
-   absence of the above class.
-
-   >>> class D(B, A, C): pass
-   ...
-   >>> D.__base__
-   <class 'C'>
-   >>>
-
-   A built-in type that is not an object or in the absence of the above class.
-
-   >>> class D(B, A, int): pass
-   ...
-   >>> D.__base__
-   <class 'int'>
-
-   The first user defined class that inherits  either an object or
-   derives from a class (directly or indirectly) that inherits an
-   object is the value returned by the :attr:`__base__` function.
-
-   >>> class D(B, A): pass
-   ...
-   >>> D.__base__
-   <class 'B'>
-
-   .. impl-detail::
-      Note that behavior of the ``__base__`` attribute is dependent on the :term:`CPython` implementation.
 
 .. c:function:: int PyObject_IsInstance(PyObject *inst, PyObject *cls)
 

Doc/library/stdtypes.rst

@@ -5492,17 +5492,6 @@ types, where they are relevant.  Some of these are not reported by the
    The tuple of base classes of a class object.
 
 
-.. attribute:: class.__base__
-
-  ``__base__`` corresponds to the :c:member:`~PyTypeObject.tp_base` in a
-  type object.  At the C level, Python has a single inheritance model
-  that determines the memory layout of instances.  There is a chain
-  involving base classes that contribute to the instance layout.
-  ``__base__`` is the base class that is involved in that chain.
-
-  .. impl-detail::
-    The behavior of the ``__base__`` attribute is dependent on the :term:`CPython` implementation.
-
 .. attribute:: definition.__name__
 
    The name of the class, function, method, descriptor, or