refactor NavBar.vue

src/views/Discover/Map/Map.vue

@@ -55,7 +55,7 @@
 <script>
 import { onBeforeMount, computed } from 'vue';
 import { storeToRefs } from 'pinia';
-import { useRouter, useRoute } from 'vue-router';
+import { useRoute } from 'vue-router';
 import axios from 'axios';
 import LoadingStore from '@/stores/loading.js';
 import AllMapDataStore from '@/stores/allMapData.js';