Remove frontend overrides for Board list title

We now fixed the title in the backend with
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/51562
so the frontend does not need to override "Backlog" with "Open"

app/assets/javascripts/boards/boards_util.js

 import { sortBy } from 'lodash';
-import { __ } from '~/locale';
 import { ListType } from './constants';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 
@@ -9,15 +8,14 @@ export function getMilestone() {
 
 export function updateListPosition(listObj) {
   const { listType } = listObj;
-  let { position, title } = listObj;
+  let { position } = listObj;
   if (listType === ListType.closed) {
     position = Infinity;
   } else if (listType === ListType.backlog) {
     position = -Infinity;
-    title = __('Open');
   }
 
-  return { ...listObj, title, position };
+  return { ...listObj, position };
 }
 
 export function formatBoardLists(lists) {

app/assets/javascripts/boards/models/list.js

@@ -35,7 +35,7 @@ class List {
   constructor(obj) {
     this.id = obj.id;
     this.position = obj.position;
-    this.title = (obj.list_type || obj.listType) === 'backlog' ? __('Open') : obj.title;
+    this.title = obj.title;
     this.type = obj.list_type || obj.listType;
 
     const typeInfo = this.getTypeInfo(this.type);