Nik Everett d150884ded Drop upgrade from full cluster restart tests (#26224)
Our documentation for the API is:
```
The _upgrade API is no longer useful and will be removed.
Instead, see Reindex to upgrade.
```

Given that, I don't think we need to test the API anymore.

Closes #25311
2017-08-15 16:00:35 -04:00
..
2017-08-15 06:19:06 +09:00