diff --git a/config-dist.php b/config-dist.php
index 1f59f8e45f9..e3402daa23d 100644
--- a/config-dist.php
+++ b/config-dist.php
@@ -489,8 +489,6 @@ $CFG->admin = 'admin';
 //
 // "\\core\\lock\\postgres_lock_factory" - DB locking based on postgres advisory locks.
 //
-// "\\core\\lock\\mysql_lock_factory" - DB locking based on mysql lock functions.
-//
 // Settings used by the lock factories
 //
 // Location for lock files used by the File locking factory. This must exist