[8.x] [ES|QL] Removes highlighting from script as it is being provided by ES docs already (#215631) (#215720)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[ES|QL] Removes highlighting from script as it is being provided by
ES docs already
(#215631)](#215631)

<!--- Backport version: 9.6.6 -->

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

<!--BACKPORT [{"author":{"name":"Stratoula
Kalafateli","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-03-24T14:17:12Z","message":"[ES|QL]
Removes highlighting from script as it is being provided by ES docs
already (#215631)\n\n## Summary\n\nThis PR
elastic/elasticsearch#125251 adds\nhighlighting
for the code blocks so it is not needed to be added on the\nkibana side.
This PR removes it.\n\nI didnt run the script because it will remove the
highlighting. It will\nrun next Monday with @craigtaverner 's PR being
merged","sha":"935fc0f7588f0efd06a40a98b929a28933869743","branchLabelMapping":{"^v9.1.0$":"main","^v8.19.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","Feature:ES|QL","Team:ESQL","backport:version","v9.1.0","v8.19.0"],"title":"[ES|QL]
Removes highlighting from script as it is being provided by ES docs
already","number":215631,"url":"https://github.com/elastic/kibana/pull/215631","mergeCommit":{"message":"[ES|QL]
Removes highlighting from script as it is being provided by ES docs
already (#215631)\n\n## Summary\n\nThis PR
elastic/elasticsearch#125251 adds\nhighlighting
for the code blocks so it is not needed to be added on the\nkibana side.
This PR removes it.\n\nI didnt run the script because it will remove the
highlighting. It will\nrun next Monday with @craigtaverner 's PR being
merged","sha":"935fc0f7588f0efd06a40a98b929a28933869743"}},"sourceBranch":"main","suggestedTargetBranches":["8.x"],"targetPullRequestStates":[{"branch":"main","label":"v9.1.0","branchLabelMappingKey":"^v9.1.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/215631","number":215631,"mergeCommit":{"message":"[ES|QL]
Removes highlighting from script as it is being provided by ES docs
already (#215631)\n\n## Summary\n\nThis PR
elastic/elasticsearch#125251 adds\nhighlighting
for the code blocks so it is not needed to be added on the\nkibana side.
This PR removes it.\n\nI didnt run the script because it will remove the
highlighting. It will\nrun next Monday with @craigtaverner 's PR being
merged","sha":"935fc0f7588f0efd06a40a98b929a28933869743"}},{"branch":"8.x","label":"v8.19.0","branchLabelMappingKey":"^v8.19.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Stratoula Kalafateli <[email protected]>

Author: kibanamachine

src/platform/packages/private/kbn-language-documentation/scripts/generate_esql_docs.ts

@@ -104,10 +104,7 @@ function writeFunctionDocs(functionDocs: Map<string, DocsSectionContent>, pathTo
       doc.description,
       Array.from(functionDocs.keys())
     );
-    const defaultMessage = replaceCodeBlocksForESQLFormatting(docWithoutLinks).replaceAll(
-      '`',
-      '\\`'
-    );
+    const defaultMessage = docWithoutLinks.replaceAll('`', '\\`');
     return `
   const foo = 
   // Do not edit manually... automatically generated by scripts/generate_esql_docs.ts
@@ -178,10 +175,6 @@ function removeAsciiDocInternalCrossReferences(asciidocString: string, functionN
   });
 }
 
-function replaceCodeBlocksForESQLFormatting(text: string) {
-  return text.replace(/```(\n[\s\S]*?\n)```/g, '``` esql$1```');
-}
-
 /**
  * This function searches the AST for the functions list
  */