Return the tabs demo to one example

app/Cargo.lock

@@ -180,7 +180,6 @@ dependencies = [
  "pulldown-cmark",
  "serde",
  "serde_json",
- "tabs-ui",
  "tempfile",
  "tokio",
  "ureq",
@@ -3611,13 +3610,6 @@ dependencies = [
  "syn 2.0.119",
 ]
 
-[[package]]
-name = "tabs-ui"
-version = "0.1.0"
-dependencies = [
- "iris",
-]
-
 [[package]]
 name = "tempfile"
 version = "3.27.0"