Remove Whitepaper link from footer

Old-network whitepaper, doesn't describe the current TEE-based
architecture. MiCA Whitepaper in the Legal column stays — it's
a separate regulatory doc.

Author: glitch003

src/components/Footer/Footer.tsx

@@ -10,7 +10,6 @@ import {
   LINKEDIN_LINK,
   SPARK_LINK,
   TWITTER_LINK,
-  WHITEPAPER_LINK,
   GALXE_LINK,
   GOVERNANCE_LINK,
   MICA_LINK,
@@ -66,14 +65,6 @@ const Footer = () => {
               >
                 Docs
               </a>
-              <a
-                href={WHITEPAPER_LINK}
-                target="_blank"
-                rel="noopener noreferrer"
-                className={styles.footer__link}
-              >
-                Whitepaper
-              </a>
               <a
                 href={GITHUB_LINK}
                 target="_blank"