Removed getSortableAttributes

app/models/index.js

@@ -31,11 +31,6 @@ export default class Index {
     };
   }
 
-  // TODO: replace to getSetting
-  getSortableAttributes() {
-    return query(`${this.path}/settings/sortable-attributes`);
-  }
-
   getStats() {
     return query(`${this.path}/stats`);
   }

app/routes/admin/indexes/item/documents/index.js

@@ -68,7 +68,7 @@ export default class AdminIndexesItemDocumentsIndexRoute extends Route {
       index,
       searchSchema,
       data: index.search(options),
-      sortableAttributes: index.getSortableAttributes(),
+      sortableAttributes: index.getSetting('sortable-attributes'),
       displayedAttributes: index.getSetting('displayed-attributes'),
       stats: index.getStats(),
     });