TST: don't skip test_datapath_missing if not --strict-data-files
don't skip test_datapath_missing if not --strict-data-files
lgtm ping on green. # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=h1) Report
> Merging [#24481](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/2c8c5dff0eed5abf7eb7c784dcf505001ee0598d?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/24481/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #24481   +/-   ##
=======================================
  Coverage   92.32%   92.32%           
=======================================
  Files         166      166           
  Lines       52306    52306           
=======================================
  Hits        48294    48294           
  Misses       4012     4012
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.75% <ø> (ø)` | :arrow_up: |
| #single | `43.06% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24481?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/24481?src=pr&el=footer). Last update [2c8c5df...d788c4d](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=h1) Report
> Merging [#24481](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/2c8c5dff0eed5abf7eb7c784dcf505001ee0598d?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/24481/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #24481   +/-   ##
=======================================
  Coverage   92.32%   92.32%           
=======================================
  Files         166      166           
  Lines       52306    52306           
=======================================
  Hits        48294    48294           
  Misses       4012     4012
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.75% <ø> (ø)` | :arrow_up: |
| #single | `43.06% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/24481?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/24481?src=pr&el=footer). Last update [2c8c5df...d788c4d](https://codecov.io/gh/pandas-dev/pandas/pull/24481?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 @jreback green! thanks!