Footer "Useful Links": Bootcamp + ODOO Hosting in 2027, drop the four

The list becomes the same four items in all three English pages:
ODOO Bootcamp -> /odoo-erp-automation-bootcamp/ (new, first),
ODOO Hosting in 2027 -> the existing comparison page (renamed from
"Odoo hosting 2027", added to the homepage which lacked it),
Support, Legal. Home / Privacy / Terms / Contact us removed.

Content-only edit inside the existing <ul>; each page keeps its own
href style. No CSS, no markup pattern change, no other footer column
touched. de/ and es/ untouched (translator owns those in parallel).

Checks: verify-html.py PROBLEMS 0; work/verify-footer-useful-links.py
PROBLEMS 0; impeccable detect finding set identical to HEAD (87
anti-patterns / 100 advisories, all pre-existing); browser check at
1280px and 375px on all three pages: 4 items, no overlap, no
horizontal overflow.

odoo-hosting-2027.html

@@ -982,11 +982,10 @@
           <div>
             <h4>Useful Links</h4>
             <ul>
-              <li><a href="index.html">Home</a></li>
-              <li><a href="odoo-hosting-2027.html">Odoo hosting 2027</a></li>
+              <li><a href="/odoo-erp-automation-bootcamp/">ODOO Bootcamp</a></li>
+              <li><a href="odoo-hosting-2027.html">ODOO Hosting in 2027</a></li>
               <li><a href="support.html">Support</a></li>
               <li><a href="legal.html">Legal</a></li>
-              <li><a href="/support.html#contact">Contact us</a></li>
             </ul>
           </div>
           <div>