[DOCS] Minor edits

Author: lcawl

docs/reference/elasticsearch/rest-apis/reindex-data-stream.md

@@ -8,13 +8,10 @@ applies_to:
 
 # Reindex data stream examples [data-stream-reindex-api]
 
-::::{admonition} New API reference
 For the most up-to-date API details, refer to [Migration APIs](https://www.elastic.co/docs/api/doc/elasticsearch/group/endpoint-migration).
 
-::::
-
 ::::{tip}
-These APIs are designed for indirect use by {{kib}}'s **Upgrade Assistant**. We strongly recommend you use the **Upgrade Assistant** to upgrade from 8.17 to {{version}}. For upgrade instructions, refer to [Upgrading to Elastic {{version}}](docs-content://deploy-manage/upgrade/deployment-or-cluster.md).
+The reindex data stream API are designed for indirect use by {{kib}}'s **Upgrade Assistant**. We strongly recommend you use the **Upgrade Assistant** to perform upgrades. Refer to [](docs-content://deploy-manage/upgrade.md).
 ::::
 
 The reindex data stream API is used to upgrade the backing indices of a data stream to the most recent major version. It works by reindexing each backing index into a new index, then replacing the original backing index with its replacement and deleting the original backing index. The settings and mappings from the original backing indices are copied to the resulting backing indices.

docs/reference/elasticsearch/rest-apis/reindex-indices.md

@@ -8,11 +8,8 @@ applies_to:
 
 # Reindex indices examples
 
-::::{admonition} New API reference
 For the most up-to-date API details, refer to [Document APIs](https://www.elastic.co/docs/api/doc/elasticsearch/group/endpoint-document).
 
-::::
-
 ## Running reindex asynchronously [docs-reindex-task-api]
 
 If the request contains `wait_for_completion=false`, {{es}} performs some preflight checks, launches the request, and returns a `task` you can use to cancel or get the status of the task. {{es}} creates a record of this task as a document at `_tasks/<task_id>`.