Do not add title field to the navbar

For most services, no title is defined, so this is a no-op.

For those services where a title is defined (currently e.g. Zenodo and Rucio)
this adds the title to the navbar as a link to "/". This isn't useful — it
means that e.g. when deployed on sdc-dev these words  link to
https://sdc-dev.astron.nl/ which is a 404.

src/components/NavBar.js

@@ -34,7 +34,6 @@ export default function NavBar() {
         height="40"
         className="d-inline-block align-top"
       />
-      <Navbar.Brand href="/">{config.title}</Navbar.Brand>
 
       <Nav className="mr-auto">
         {navlist.map((nav) => (