Hide out of stock products OC 2.3.1

Hello veryone. I need your help in something. I would like to hide out of stock products from site but those products to still remain in google search, and the links to be active with out of stock status. Could someone please point to the line that does that or some ideas? Thanks in advance.

http://www.opencart.com/index.php?route ... of%20stock

works in 2.0.3.1

Than you very much. That does the trick.