refactor: remove obsolete code

src/mixins/navigation.js

@@ -15,20 +15,9 @@ export default {
   methods: {
     toggleSheet(itemIndex) {
       const link = this.itemurls[itemIndex];
-      this.defaultView();
 
+      this.defaultView();
       this.$router.push({ query: { itemurl: link } });
-
-      // const tree = document.getElementsByClassName('view-tree');
-      //
-      // if (tree.length) {
-      //   window.location.hash = `selectedItem-${link}`;
-      //   tree[0].scrollBy(0, -80);
-      // }
-      //
-      // this.sequenceindex = this.computedsequenceindex;
-      // this.updateItem(this.itemurls[itemIndex], this.sequenceindex);
-      // this.updateSequenceIndex(this.sequenceindex);
     },
 
     updateItem() {