diff --git a/mod/quiz/lib.php b/mod/quiz/lib.php
index dbad287cf56..880c07f8939 100644
--- a/mod/quiz/lib.php
+++ b/mod/quiz/lib.php
@@ -170,10 +170,6 @@ function quiz_delete_instance($id) {
         $result = false;
     }
 
-    if (! delete_records('block_instance', 'pageid', $quiz->id, 'pagetype', PAGE_QUIZ_VIEW)) {
-        $result = false;
-    }
-
     if ($events = get_records_select('event', "modulename = 'quiz' and instance = '$quiz->id'")) {
         foreach($events as $event) {
             delete_event($event->id);