Fixed issue with leftover test.json file
- [ ] closes #19815
- [ ] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19879?src=pr&el=h1) Report
> :exclamation: No coverage uploaded for pull request base (`master@c1237f2`). [Click here to learn what that means](https://docs.codecov.io/docs/error-reference#section-missing-base-commit).
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/19879/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/19879?src=pr&el=tree)

```diff
@@            Coverage Diff            @@
##             master   #19879   +/-   ##
=========================================
  Coverage          ?   91.65%           
=========================================
  Files             ?      150           
  Lines             ?    48915           
  Branches          ?        0           
=========================================
  Hits              ?    44835           
  Misses            ?     4080           
  Partials          ?        0
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.03% <ø> (?)` | |
| #single | `41.83% <ø> (?)` | |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19879?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19879?src=pr&el=footer). Last update [c1237f2...7927c6a](https://codecov.io/gh/pandas-dev/pandas/pull/19879?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!