update package.json

package.json

@@ -18,7 +18,6 @@
   "devDependencies": {
     "@vue/cli-plugin-babel": "^3.8.0",
     "@vue/cli-service": "^3.8.0",
-    "copy-webpack-plugin": "^5.1.1",
     "vue-template-compiler": "^2.6.10"
   }
 }