def METHOD_NAME(test_obj: 'T0TestBase'):
    '''
    Args:
        test_obj: test object
    remove vlan
    '''
    configer = VlanConfiger(test_obj)
    # remove default vlan
    default_vlan_id = configer.get_default_vlan()
    members = configer.get_vlan_member(default_vlan_id)
    configer.remove_vlan_members(members)
   # configer.remove_vlan(default_vlan_id)
    for _, vlan in test_obj.dut.vlans.items():
        members = configer.get_vlan_member(vlan.oid)
        configer.remove_vlan_members(members)
        configer.remove_vlan(vlan.oid)
    test_obj.dut.vlans.clear()