Remove batch record loading support from Primo backend as it doesn't work...

Remove batch record loading support from Primo backend as it doesn't work properly (too many hits, a too long query will fail).

module/VuFindSearch/src/VuFindSearch/Backend/Primo/Backend.php

@@ -28,8 +28,6 @@
  */
 namespace VuFindSearch\Backend\Primo;
 
-use VuFindSearch\Feature\RetrieveBatchInterface;
-
 use VuFindSearch\Query\AbstractQuery;
 
 use VuFindSearch\ParamBag;
@@ -49,7 +47,7 @@ use VuFindSearch\Backend\Exception\BackendException;
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     https://vufind.org
  */
-class Backend extends AbstractBackend implements RetrieveBatchInterface
+class Backend extends AbstractBackend
 {
     /**
      * Connector.
@@ -152,52 +150,6 @@ class Backend extends AbstractBackend implements RetrieveBatchInterface
         return $collection;
     }
 
-    /**
-     * Retrieve a batch of documents.
-     *
-     * @param array    $ids    Array of document identifiers
-     * @param ParamBag $params Search backend parameters
-     *
-     * @return RecordCollectionInterface
-     */
-    public function retrieveBatch($ids, ParamBag $params = null)
-    {
-        $onCampus = (null !== $params) ? $params->get('onCampus') : [false];
-        $onCampus = $onCampus ? $onCampus[0] : false;
-
-        // Load 100 records at a time; this is a good number to avoid memory
-        // problems while still covering a lot of ground.
-        $pageSize = 100;
-
-        // Retrieve records a page at a time:
-        $results = false;
-        while (count($ids) > 0) {
-            $currentPage = array_splice($ids, 0, $pageSize, []);
-
-            try {
-                $response = $this->connector->getRecords(
-                    $currentPage, $this->connector->getInstitutionCode(), $onCampus
-                );
-            } catch (\Exception $e) {
-                throw new BackendException(
-                    $e->getMessage(),
-                    $e->getCode(),
-                    $e
-                );
-            }
-            $next = $this->createRecordCollection($response);
-            if (!$results) {
-                $results = $next;
-            } else {
-                foreach ($next->getRecords() as $record) {
-                    $results->add($record);
-                }
-            }
-        }
-        $this->injectSourceIdentifier($results);
-        return $results;
-    }
-
     /**
      * Set the query builder.
      *