dianabyron on "how to disable "accept remote TCP connections""

Another question on security: "Hide version info: Hiding the WP version info is a small step to prevent bots from crawling your site, it does not prevent fingerprinting, but every little bit helps. In your theme’s functions.php add the following:" and it shows code about removing version info from head and feeds.... BUT WHERE in functions.php does one put that code?
Thanks for any suggestions....