tui: remove update complete toast notification

packages/opencode/src/cli/cmd/tui/app.tsx

@@ -606,15 +606,6 @@ function App() {
     })
   })
 
-  sdk.event.on(Installation.Event.Updated.type, (evt) => {
-    toast.show({
-      variant: "success",
-      title: "Update Complete",
-      message: `OpenCode updated to v${evt.properties.version}`,
-      duration: 5000,
-    })
-  })
-
   sdk.event.on(Installation.Event.UpdateAvailable.type, (evt) => {
     toast.show({
       variant: "info",