remove the label

app/assets/javascripts/boards/boards_bundle.js

@@ -102,7 +102,6 @@ $(() => {
 
             if (list.type === 'closed') {
               list.position = Infinity;
-              list.label = { description: 'Shows all closed issues. Moving an issue to this list closes it' };
             } else if (list.type === 'backlog') {
               list.position = -1;
             }