bpo-34365: Update date object documentation (pythonGH-8814)

Python 3.x does not fall back to comparing object addresses when comparing two `dt` objects.

<!-- issue-number: [bpo-34365](https://www.bugs.python.org/issue34365) -->
https://bugs.python.org/issue34365
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Doc/library/datetime.rst

@@ -526,10 +526,9 @@ Notes:
 
 (4)
    In other words, ``date1 < date2`` if and only if ``date1.toordinal() <
-   date2.toordinal()``. In order to stop comparison from falling back to the
-   default scheme of comparing object addresses, date comparison normally raises
-   :exc:`TypeError` if the other comparand isn't also a :class:`date` object.
-   However, ``NotImplemented`` is returned instead if the other comparand has a
+   date2.toordinal()``. Date comparison raises :exc:`TypeError` if
+   the other comparand isn't also a :class:`date` object. However,
+   ``NotImplemented`` is returned instead if the other comparand has a
    :meth:`timetuple` attribute.  This hook gives other kinds of date objects a
    chance at implementing mixed-type comparison. If not, when a :class:`date`
    object is compared to an object of a different type, :exc:`TypeError` is raised