var doc = {
  local: {
    username: 'admin',
    status: true,
    password: '$2a$08$81Kq7/59ZASHl5k9n5cNvOUSl/HYgpLKZjs66P/OJV8vw.nHW60Ta',
    lastname: 'admin',
    firstname: 'admin',
    email: 'admin@gmail.com',
    datetime_modified: 'TueAug30201623: 10: 56GMT+0530(IST)',
    datetime_created: 'MonAug29201622: 34: 12GMT+0530(IST)'
  },
  roles: [
    'ADMIN',
    'HR'
  ],
  GridOrder: [
    {
      _id: '57e507fce94094be085425c9',
      domainName: 'items'
    }
  ],
  _id: '57c46b0c12907af910167ff5',
  __v: 9
}

delete doc.GridOrder

delete doc['GridOrder']