Remove reference to non-existing class names

_components/footer.tsx

@@ -9,13 +9,13 @@ export default function({ comp }) {
     <footer className="page-footer">
       <div className="social-links">
         <a href="https://code.fosterhangdaan.com/foster" title="Forgejo" target="_blank">
-          <ForgejoIcon className="icon"/>
+          <ForgejoIcon/>
         </a>
         <a href="https://mastodon.online/@foster" title="Mastodon" target="_blank">
-          <MastodonIcon className="icon"/>
+          <MastodonIcon/>
         </a>
         <a href="mailto:foster@hangdaan.email" title="eMail">
-          <MailIcon className="icon"/>
+          <MailIcon/>
         </a>
       </div>
       <p>Copyright &copy; 2023 Foster Hangdaan</p>