bpo-29535: Remove promize about hash randomization of datetime objects. (GH-15269)

(cherry picked from commit e9c90aa43144b0be1e4e393e8cb549573437a5da)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Misc/python.man b/Misc/python.man
index 8d5ad8c..3aa9f1f 100644
--- a/Misc/python.man
+++ b/Misc/python.man
@@ -431,7 +431,7 @@
 specifying the \fB\-W\fP option for each separate value.
 .IP PYTHONHASHSEED
 If this variable is set to "random", a random value is used to seed the hashes
-of str, bytes and datetime objects.
+of str and bytes objects.
 
 If PYTHONHASHSEED is set to an integer value, it is used as a fixed seed for
 generating the hash() of the types covered by the hash randomization.  Its