移除 /src/layouts/BasicLayout.vue L44, L69, L80
  // L44
  <multi-tab v-if="multiTab"></multi-tab>
      
  // L69
  import MultiTab from '@/components/MultiTab'
      
  // L80
  MultiTab,
移除 /src/config/defaultSettings.js L25
移除 src/store/modules/app.js L27, L76-L79, L118-L120
移除 src/utils/mixin.js L21
删除组件目录 src/components/MultiTab
以上
L x均代表行N ,如 L3 = 行3