Alternative: Remove js routes

[CloCkWeRX]

When I look at Growstuff.org, I can get access to Routes via the browser console.

But nothing in the code or compiled assests references it!

So; removing as an alternative to #3419

[cesy]

Since nothing currently uses it, we might as well simplify - if we add something that needs it later, we can add the new version or a competitor at that stage.