设备预设命令怎么删除

domain system

# domain default enable system

# role name level-0 description Predefined level-0 role

# role name level-1 description Predefined level-1 role

# role name level-2 description Predefined level-2 role

# role name level-3 description Predefined level-3 role

# role name level-4 description Predefined level-4 role

# role name level-5 description Predefined level-5 role

# role name level-6 description Predefined level-6 role

# role name level-7 description Predefined level-7 role

# role name level-8 description Predefined level-8 role

# role name level-9 description Predefined level-9 role

# role name level-10 description Predefined level-10 role

# role name level-11 description Predefined level-11 role

# role name level-12 description Predefined level-12 role

# role name level-13 description Predefined level-13 role

# role name level-14 description Predefined level-14 role #············

这些预设命令怎样删除？这样使得设备的配置文档简洁。