old_contents: jest.mock('')
  import './config/config'
  import {
    setup as setupModel
  } from './model'
  
  setupModel({
    url: DIGDAG_CONFIG.url,
    td: DIGDAG_CONFIG.td,
    credentials: null,
    headers: DIGDAG_CONFIG.headers
  })
new_contents: import './config/config'
  import {
    setup as setupModel
  } from './model'
  
  setupModel({
    url: DIGDAG_CONFIG.url,
    td: DIGDAG_CONFIG.td,
    credentials: null,
    headers: DIGDAG_CONFIG.headers
  })
subject: remove unneccessary line