[8.15] [DOCS] Remove "Save changes" statement from the quer…

…y page of the Playground (elastic#192945) (elastic#193584)

# Backport

This will backport the following commits from `main` to `8.15`:
- [[DOCS] Remove "Save changes" statement from the query page
of the Playground
(elastic#192945)](elastic#192945)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Dai
Sugimori","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-09-20T13:45:29Z","message":"[DOCS]
Remove \"Save changes\" statement from the query page of the Playground
(elastic#192945)\n\n## Summary\r\n\r\nOn the [\"View and modify
queries\"\r\npage](https://www.elastic.co/guide/en/kibana/8.15/playground-query.html)\r\nunder
the Playground documentation, there is a statement \"Click
Save\r\nchanges.\" But there is no such button on Kibana 8.15.1 and
changes are\r\napplied automatically, so this statement is not
needed.\r\n\r\nI can see \"Save changes\" button on 8.14.0, so I believe
it disappears\r\nfrom 8.15.0.\r\n\r\n<img width=\"1440\"
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Remove \"Save changes\" statement from the query page of the
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Remove \"Save changes\" statement from the query page of the Playground
(elastic#192945)\n\n## Summary\r\n\r\nOn the [\"View and modify
queries\"\r\npage](https://www.elastic.co/guide/en/kibana/8.15/playground-query.html)\r\nunder
the Playground documentation, there is a statement \"Click
Save\r\nchanges.\" But there is no such button on Kibana 8.15.1 and
changes are\r\napplied automatically, so this statement is not
needed.\r\n\r\nI can see \"Save changes\" button on 8.14.0, so I believe
it disappears\r\nfrom 8.15.0.\r\n\r\n<img width=\"1440\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/009d72fa-3adf-4c9b-8e49-f068df638755\">","sha":"463a63603fb05997ec2e44d50d83a7b852db02b2"}},"sourceBranch":"main","suggestedTargetBranches":["8.15","8.x"],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/192945","number":192945,"mergeCommit":{"message":"[DOCS]
Remove \"Save changes\" statement from the query page of the Playground
(elastic#192945)\n\n## Summary\r\n\r\nOn the [\"View and modify
queries\"\r\npage](https://www.elastic.co/guide/en/kibana/8.15/playground-query.html)\r\nunder
the Playground documentation, there is a statement \"Click
Save\r\nchanges.\" But there is no such button on Kibana 8.15.1 and
changes are\r\napplied automatically, so this statement is not
needed.\r\n\r\nI can see \"Save changes\" button on 8.14.0, so I believe
it disappears\r\nfrom 8.15.0.\r\n\r\n<img width=\"1440\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/009d72fa-3adf-4c9b-8e49-f068df638755\">","sha":"463a63603fb05997ec2e44d50d83a7b852db02b2"}},{"branch":"8.15","label":"v8.15.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.x","label":"v8.16.0","branchLabelMappingKey":"^v8.16.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Dai Sugimori <[email protected]>

docs/playground/playground-query.asciidoc

@@ -12,7 +12,6 @@ The {x} UI enables you to view and modify these queries.
 
 * Click *View query* to open the visual query editor.
 * Modify the query by selecting fields to query per index.
-* Click *Save changes*.
 
 [TIP]
 ====