Binlog enabled on replcas

https://github.com/sclorg/mariadb-container/blob/3ae4a5259d18ddf5cac7c36d5334ca9aafcf9bb1/root-common/usr/share/container-scripts/mysql/pre-init/my-slave.cnf.template#L4

Why is binlog enabled on replicas? That is not needed there. And there is no Variable to disable it.