onboarding: Remove feature flag and old welcome crate (#36110)

Release Notes:

- N/A

---------

Co-authored-by: MrSubidubi <dev@bahn.sh>
Co-authored-by: Anthony <anthony@zed.dev>

crates/zed/src/main.rs

@@ -20,6 +20,7 @@ use gpui::{App, AppContext as _, Application, AsyncApp, Focusable as _, UpdateGl
 use gpui_tokio::Tokio;
 use http_client::{Url, read_proxy_from_env};
 use language::LanguageRegistry;
+use onboarding::{FIRST_OPEN, show_onboarding_view};
 use prompt_store::PromptBuilder;
 use reqwest_client::ReqwestClient;
 
@@ -44,7 +45,6 @@ use theme::{
 };
 use util::{ResultExt, TryFutureExt, maybe};
 use uuid::Uuid;
-use welcome::{FIRST_OPEN, show_welcome_view};
 use workspace::{
     AppState, SerializedWorkspaceLocation, Toast, Workspace, WorkspaceSettings, WorkspaceStore,
     notifications::NotificationId,
@@ -623,7 +623,6 @@ pub fn main() {
         feedback::init(cx);
         markdown_preview::init(cx);
         svg_preview::init(cx);
-        welcome::init(cx);
         onboarding::init(cx);
         settings_ui::init(cx);
         extensions_ui::init(cx);
@@ -1044,7 +1043,7 @@ async fn restore_or_create_workspace(app_state: Arc<AppState>, cx: &mut AsyncApp
             }
         }
     } else if matches!(KEY_VALUE_STORE.read_kvp(FIRST_OPEN), Ok(None)) {
-        cx.update(|cx| show_welcome_view(app_state, cx))?.await?;
+        cx.update(|cx| show_onboarding_view(app_state, cx))?.await?;
     } else {
         cx.update(|cx| {
             workspace::open_new(