perf(sidebar): rm unique-opened

src/views/layout/components/Sidebar/index.vue

 <template>
   <scroll-bar>
-    <el-menu mode="vertical" unique-opened :default-active="$route.path" :collapse="isCollapse" background-color="#304156" text-color="#fff" active-text-color="#409EFF">
+    <el-menu mode="vertical" :default-active="$route.path" :collapse="isCollapse" background-color="#304156" text-color="#fff" active-text-color="#409EFF">
       <sidebar-item :routes="permission_routers"></sidebar-item>
     </el-menu>
   </scroll-bar>