That's strange. I did the exact same thing, with no results whatsoever. Even renamed the file to see if it broke the website (if it was being used), but it didn't. And I did clear the cache twice, and CTRL + F5.
I wish there was an easy way to track down the files used by the site, but even the inspector can only tell me so much.
EDIT: Turns out something did change, but not where I wanted it to change. I changed the link on the login page. I want to change the link on the top menu bar where users can register directly. Guess I'll keep looking!