James Rodewig 7002ce1e9c [DOCS] Replace _uid refs in reindex slicing docs (#48649)
PR #25543 removed the `_uid` field in favor of the `_id` field,
including for use in slicing.

This removes an outdated reference to `_uid` in our reindex docs.
2019-10-29 16:41:53 -04:00
..