remove reference to subtype_delloc

Author: robinnarsinghranabhat

Doc/extending/extending.rst

@@ -1086,10 +1086,9 @@ user-defined class, and let's further suppose that the class defined a
 :meth:`!__del__` method.  If this class instance has a reference count of 1,
 disposing of it will call its :meth:`!__del__` method. Internally,
 :c:func:`PyList_SetItem` calls :c:func:`Py_DECREF` on the replaced item,
-which invokes replaced item's corresponding
-:c:member:`~PyTypeObject.tp_dealloc` function (that is
-:c:func:`subtype_dealloc` in case of Python class instance). During
-deallocation, :c:func:`subtype_dealloc` calls
+which invokes replaced item's corrresponding
+:c:member:`~PyTypeObject.tp_dealloc` function. During
+deallocation, :c:member:`~PyTypeObject.tp_dealloc` calls
 :c:member:`~PyTypeObject.tp_finalize`, which is mapped to the
 :meth:`!__del__` method for class instances (see :pep:`442`). This entire
 sequence happens synchronously within the :c:func:`PyList_SetItem` call.