workflow: remove the 'serve' command

Author: cloydlau

package.json

@@ -42,7 +42,6 @@
     "dev3": "cl switchVue 3 && vite --config ./demo/vue3/vite.config.ts --open",
     "dev2.7": "cl switchVue 2.7 && vite --config ./demo/vue2.7/vite.config.ts --open",
     "dev2.6": "cl switchVue 2.6 && vite --config ./demo/vue2.6/vite.config.ts --open",
-    "serve": "vite preview",
     "doc": "vitepress dev --open /README",
     "build": "vite build",
     "test-unit": "vitest run",