#6946: fix duplicate index entries for datetime classes.
diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst
index 5539c5a..7251479 100644
--- a/Doc/library/datetime.rst
+++ b/Doc/library/datetime.rst
@@ -65,6 +65,7 @@
.. class:: date
+ :noindex:
An idealized naive date, assuming the current Gregorian calendar always was, and
always will be, in effect. Attributes: :attr:`year`, :attr:`month`, and
@@ -72,6 +73,7 @@
.. class:: time
+ :noindex:
An idealized time, independent of any particular day, assuming that every day
has exactly 24\*60\*60 seconds (there is no notion of "leap seconds" here).
@@ -80,6 +82,7 @@
.. class:: datetime
+ :noindex:
A combination of a date and a time. Attributes: :attr:`year`, :attr:`month`,
:attr:`day`, :attr:`hour`, :attr:`minute`, :attr:`second`, :attr:`microsecond`,
@@ -87,6 +90,7 @@
.. class:: timedelta
+ :noindex:
A duration expressing the difference between two :class:`date`, :class:`time`,
or :class:`datetime` instances to microsecond resolution.