failed the script when bundle:default fails and cleanup "alpha" (#8580)

ui/desktop/vite.renderer.config.mts

@@ -4,8 +4,6 @@ import tailwindcss from '@tailwindcss/vite';
 // https://vitejs.dev/config
 export default defineConfig({
   define: {
-    // This replaces process.env.ALPHA with a literal at build time
-    'process.env.ALPHA': JSON.stringify(process.env.ALPHA === 'true'),
     'process.env.GOOSE_TUNNEL': JSON.stringify(process.env.GOOSE_TUNNEL !== 'no' && process.env.GOOSE_TUNNEL !== 'none'),
   },