diff --git a/frontend/app_flowy/packages/appflowy_editor/example/assets/example.json b/frontend/app_flowy/packages/appflowy_editor/example/assets/example.json
index d7fc310573..2d441d3367 100644
--- a/frontend/app_flowy/packages/appflowy_editor/example/assets/example.json
+++ b/frontend/app_flowy/packages/appflowy_editor/example/assets/example.json
@@ -25,11 +25,6 @@
           }
         ]
       },
-      {
-        "type": "text",
-        "attributes": { "subtype": "code_block", "theme": "vs", "language": "dart" },
-        "delta": [{ "insert": "final x = 0;\nprint($x);" }]
-      },
       { "type": "text", "delta": [] },
       {
         "type": "text",