chore(tui/tests): remove stale experimental mode test for startup configuration

Author: ignatremizov

codex-rs/tui/src/chatwidget/tests.rs

@@ -5323,56 +5323,6 @@ async fn collaboration_modes_defaults_to_code_on_startup() {
     assert_eq!(chat.current_model(), resolved_model);
 }
 
-#[tokio::test]
-async fn experimental_mode_plan_is_ignored_on_startup() {
-    let codex_home = tempdir().expect("tempdir");
-    let cfg = ConfigBuilder::default()
-        .codex_home(codex_home.path().to_path_buf())
-        .cli_overrides(vec![
-            (
-                "features.collaboration_modes".to_string(),
-                TomlValue::Boolean(true),
-            ),
-            (
-                "tui.experimental_mode".to_string(),
-                TomlValue::String("plan".to_string()),
-            ),
-        ])
-        .build()
-        .await
-        .expect("config");
-    let resolved_model = codex_core::test_support::get_model_offline(cfg.model.as_deref());
-    let otel_manager = test_otel_manager(&cfg, resolved_model.as_str());
-    let thread_manager = Arc::new(
-        codex_core::test_support::thread_manager_with_models_provider(
-            CodexAuth::from_api_key("test"),
-            cfg.model_provider.clone(),
-        ),
-    );
-    let auth_manager =
-        codex_core::test_support::auth_manager_from_auth(CodexAuth::from_api_key("test"));
-    let init = ChatWidgetInit {
-        config: cfg,
-        frame_requester: FrameRequester::test_dummy(),
-        app_event_tx: AppEventSender::new(unbounded_channel::<AppEvent>().0),
-        initial_user_message: None,
-        enhanced_keys_supported: false,
-        auth_manager,
-        models_manager: thread_manager.get_models_manager(),
-        feedback: codex_feedback::CodexFeedback::new(),
-        is_first_run: true,
-        feedback_audience: FeedbackAudience::External,
-        model: Some(resolved_model.clone()),
-        startup_tooltip_override: None,
-        status_line_invalid_items_warned: Arc::new(AtomicBool::new(false)),
-        otel_manager,
-    };
-
-    let chat = ChatWidget::new(init, thread_manager);
-    assert_eq!(chat.active_collaboration_mode_kind(), ModeKind::Default);
-    assert_eq!(chat.current_model(), resolved_model);
-}
-
 #[tokio::test]
 async fn set_model_updates_active_collaboration_mask() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(Some("gpt-5.1")).await;