Removed unnecessary TODO

src/main/java/envoy/server/processors/ContactOperationProcessor.java

@@ -32,8 +32,7 @@ public class ContactOperationProcessor implements ObjectProcessor<ContactOperati
 				System.out.printf("Adding user %s to the contact list of user %d.%n", evt.get(), userId);
 				PersistenceManager.getPersistenceManager().addContact(userId, contactId);
 
-				// Notify the contact
-				// TODO: cache notification for offline mode
+				// Notify the contact if online
 				if (ConnectionManager.getInstance().isOnline(contactId)) writeProxy.write(connectionManager.getSocketId(contactId),
 						new Contacts(Arrays.asList(PersistenceManager.getPersistenceManager().getUserById(userId).toCommonUser())));
 				break;