Doc: Do not suggest `s[::-1]` for reversed order (GH-22457)

diff --git a/Doc/faq/programming.rst b/Doc/faq/programming.rst
index 57ab3e2..b75c60a 100644
--- a/Doc/faq/programming.rst
+++ b/Doc/faq/programming.rst
@@ -1116,7 +1116,7 @@
 How do I iterate over a sequence in reverse order?
 --------------------------------------------------
 
-Use the :func:`reversed` built-in function, which is new in Python 2.4::
+Use the :func:`reversed` built-in function::
 
    for x in reversed(sequence):
        ...  # do something with x ...
@@ -1124,11 +1124,6 @@
 This won't touch your original sequence, but build a new copy with reversed
 order to iterate over.
 
-With Python 2.3, you can use an extended slice syntax::
-
-   for x in sequence[::-1]:
-       ...  # do something with x ...
-
 
 How do you remove duplicates from a list?
 -----------------------------------------