chore: remove cssnano devDependencies

Author: coderwyd

package.json

@@ -38,7 +38,6 @@
     "@vitejs/plugin-vue": "^5.1.4",
     "@vitejs/plugin-vue-jsx": "^4.0.1",
     "cross-env": "^7.0.3",
-    "cssnano": "^7.0.6",
     "dotenv": "^16.4.5",
     "eslint": "^9.11.1",
     "fs-extra": "^11.2.0",