Hi,
The code is there, but it is in the incorrect location, it is encapsulated within the previous function before the closing parenthesis, so it has no effect.
I have tried to fix it via editing the functions.php, but it does not let me via the back-end. This should be the correct functions.php file: https://gist.github.com/anag0/7dcce5fccb03111190444e8b5f47dabe