MDL-47070 mod_lesson: useless db query that should be deleted

mod/lesson/lib.php

@@ -51,15 +51,13 @@ function lesson_add_instance($data, $mform) {
     $lessonid = $DB->insert_record("lesson", $data);
     $data->id = $lessonid;
 
-    $lesson = $DB->get_record('lesson', array('id'=>$lessonid), '*', MUST_EXIST);
-
     lesson_update_media_file($lessonid, $context, $draftitemid);
 
     lesson_process_post_save($data);
 
     lesson_grade_item_update($data);
 
-    return $lesson->id;
+    return $lessonid;
 }
 
 /**