chore: remove sideEffects #103

package.json

 {
   "name": "@ant-design-vue/pro-layout",
-  "version": "3.0.0-beta.1",
+  "version": "3.0.0-beta.2",
   "main": "./lib/index.js",
   "module": "./es/index.js",
-  "sideEffects": false,
   "repository": {
     "type": "git",
     "url": "https://github.com/vueComponent/pro-layout"