Remove Wordfence WAF Optimization

I was optimizing Wordfence WAF.
I clicked on configure > Manual Configuration > Continue.

Then it showed me this message:
The required file has been created. Please add this code in your php.ini file:

auto_prepend_file = ‘/home/customer/www/(my domain name)/public_html/wordfence-waf.php’

Now I think that I don’t need this feature currently, so I did not add the above line in my php.ini

But where can I find that “required file” which it has created? So, that I can delete it too and undo the optimization completely.