code: function deletePolicy (params, cb) {
        let promise = null
        if (typeof cb !== 'function') [promise, cb] = asyncify()
  
        const { id, organizationId } = params
        const tasks = [
          (job, next) => {
            Joi.validate({ id, organizationId }, validationRules.deletePolicy, (err) => {
              if (err) return next(Boom.badRequest(err))
  
              next()
            })
          },
          (job, next) => {
            job.id = id
            job.organizationId = organizationId
            next()
          },
          removePolicyFromUsers,
          removePolicyFromTeams,
          removePolicyFromOrganizations,
          removePolicy
        ]
  
        db.withTransaction(tasks, (err, res) => {
          if (err) return cb(err)
          cb()
        })
  
        return promise
      }
docs: Delete a specific policy
  
  @param  {Object}   params { id, organizationId }
  @param  {Function} cb