Is it possible to remove/comment-out the checkbox and text 'Stay signed in for two weeks' on the login page?

I have found the login.php file in concrete/single_pages but not sure where that particular section originates.

This is my client's request for a lightly customised page for their clients to log in.

I've changed the background image with the Login Page Background add-on, so I don't know if that affects/complicates things further.

Thanks!