docs: remove arrival confirmation roadmap card

Author: MehranMazhar

index.html

@@ -347,11 +347,6 @@ <h3>Public stage testnet</h3>
                     <h3>DAO governance</h3>
                     <p>Community voting on protocol parameters and upgrades. Not yet implemented in the codebase.</p>
                 </div>
-                <div class="roadmap-card planned">
-                    <span class="roadmap-status">Planned</span>
-                    <h3>Arrival confirmation</h3>
-                    <p>ConfirmArrival and ComplainArrival transaction types exist as stubs and will complete the ride lifecycle.</p>
-                </div>
                 <div class="roadmap-card planned">
                     <span class="roadmap-status">Planned</span>
                     <h3>Mainnet</h3>