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

(cherry picked from commit fb2e946)

Co-authored-by: Andre Delfino <[email protected]>

Author: miss-islington

Doc/faq/programming.rst

@@ -1121,19 +1121,14 @@ trailing newline from a string.
 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 ...
 
 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?
 -----------------------------------------

Doc/tools/susp-ignored.csv

@@ -12,7 +12,6 @@ extending/extending,,:myfunction,"PyArg_ParseTuple(args, ""D:myfunction"", &c);"
 extending/extending,,:set,"if (PyArg_ParseTuple(args, ""O:set_callback"", &temp)) {"
 extending/newtypes,,:call,"if (!PyArg_ParseTuple(args, ""sss:call"", &arg1, &arg2, &arg3)) {"
 faq/programming,,:chr,">=4.0) or 1+f(xc,yc,x*x-y*y+xc,2.0*x*y+yc,k-1,f):f(xc,yc,x,y,k,f):chr("
-faq/programming,,::,for x in sequence[::-1]:
 faq/programming,,:reduce,"print((lambda Ru,Ro,Iu,Io,IM,Sx,Sy:reduce(lambda x,y:x+y,map(lambda y,"
 faq/programming,,:reduce,"Sx=Sx,Sy=Sy:reduce(lambda x,y:x+y,map(lambda x,xc=Ru,yc=yc,Ru=Ru,Ro=Ro,"
 faq/windows,,:d48eceb,"Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:04:45) [MSC v.1900 32 bit (Intel)] on win32"