fix

packages/stream_chat_flutter/example/lib/tutorial_part_4.dart

@@ -96,13 +96,6 @@ class ChannelPage extends StatelessWidget {
               threadBuilder: (_, parentMessage) => ThreadPage(
                 parent: parentMessage,
               ),
-              messageBuilder: (context, message, list, defaultMessage) {
-                return defaultMessage.copyWith(
-                  deletedBottomRowBuilder: (c, m) {
-                    return VisibleFootnote();
-                  },
-                );
-              },
             ),
           ),
           const MessageInput(),