Remove redundant test (#1456)
Remove redundant test (#1456)

This test is redundant with this one in `test_delay.js`:

```js
test('calling delay could cause mikealRequest timeout error', t => {
  const scope = nock('http://example.test')
    .get('/')
    .delay({
      head: 300,
    })
    .reply(200, 'OK')

  mikealRequest(
    {
      uri: 'http://example.test',
      method: 'GET',
      timeout: 100,
    },
    function(err) {
      scope.done()
      t.equal(err && err.code, 'ESOCKETTIMEDOUT')
      t.end()
    }
  )
})
```
node-nock/nock