Correcting documentation to reflect discontinuation of 'new "Iterator"' approach.  Cf.:  https://trac.parrot.org/parrot/ticket/1170.
Correcting documentation to reflect discontinuation of 'new "Iterator"' approach.  Cf.:  https://trac.parrot.org/parrot/ticket/1170.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@42216 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot