Remove Settings page link from admin navbar

- Removed the 'Settings' link from the admin navigation menu
- Settings page route and template still exist but are no longer accessible from navbar
- Admin navbar now shows: Cluster Tokens, Cluster Nodes (no Settings)

templates/base.html

@@ -80,7 +80,6 @@
                 {% if user.get('role') == 'admin' %}
                 <a href="/admin/cluster_tokens" {% if active_page == 'cluster_tokens' %}class="active"{% endif %}>Cluster Tokens</a>
                 <a href="/admin/cluster_nodes" {% if active_page == 'cluster_nodes' %}class="active"{% endif %}>Cluster Nodes</a>
-                <a href="/admin/settings" {% if active_page == 'settings' %}class="active"{% endif %}>Settings</a>
                 {% endif %}
             </nav>
             <div class="user-menu">