chore: fix warnings

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/date_cell.dart

@@ -7,7 +7,6 @@ import 'package:flowy_infra_ui/style_widget/text.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:table_calendar/table_calendar.dart';
-import 'package:window_size/window_size.dart';
 
 class DateCell extends GridCell {
   final CellData cellData;

shared-lib/flowy-sync/src/client_grid/grid_block_meta_pad.rs

@@ -258,7 +258,7 @@ mod tests {
         assert_eq!(pad.rows.first().unwrap().as_ref(), &row);
         assert_eq!(
             change.delta.to_delta_str(),
-            r#"[{"retain":24},{"insert":"{\"id\":\"1\",\"block_id\":\"1\",\"cells\":{},\"height\":0,\"visibility\":false}"},{"retain":2}]"#
+            r#"[{"retain":24},{"insert":"{\"id\":\"1\",\"block_id\":\"1\",\"cells\":[],\"height\":0,\"visibility\":false}"},{"retain":2}]"#
         );
     }
 
@@ -272,19 +272,19 @@ mod tests {
         let change = pad.add_row_meta(row_1.clone(), None).unwrap().unwrap();
         assert_eq!(
             change.delta.to_delta_str(),
-            r#"[{"retain":24},{"insert":"{\"id\":\"1\",\"block_id\":\"1\",\"cells\":{},\"height\":0,\"visibility\":false}"},{"retain":2}]"#
+            r#"[{"retain":24},{"insert":"{\"id\":\"1\",\"block_id\":\"1\",\"cells\":[],\"height\":0,\"visibility\":false}"},{"retain":2}]"#
         );
 
         let change = pad.add_row_meta(row_2.clone(), None).unwrap().unwrap();
         assert_eq!(
             change.delta.to_delta_str(),
-            r#"[{"retain":90},{"insert":",{\"id\":\"2\",\"block_id\":\"1\",\"cells\":{},\"height\":0,\"visibility\":false}"},{"retain":2}]"#
+            r#"[{"retain":90},{"insert":",{\"id\":\"2\",\"block_id\":\"1\",\"cells\":[],\"height\":0,\"visibility\":false}"},{"retain":2}]"#
         );
 
         let change = pad.add_row_meta(row_3.clone(), Some("2".to_string())).unwrap().unwrap();
         assert_eq!(
             change.delta.to_delta_str(),
-            r#"[{"retain":157},{"insert":",{\"id\":\"3\",\"block_id\":\"1\",\"cells\":{},\"height\":0,\"visibility\":false}"},{"retain":2}]"#
+            r#"[{"retain":157},{"insert":",{\"id\":\"3\",\"block_id\":\"1\",\"cells\":[],\"height\":0,\"visibility\":false}"},{"retain":2}]"#
         );
 
         assert_eq!(*pad.rows[0], row_1);