Merge pull request #4402 from ClickHouse/Blargian-patch-283382

Knowledge base: update remove-default-user.mdx with a note

Author: Blargian

knowledgebase/remove-default-user.mdx

@@ -11,6 +11,10 @@ words: ['Remove Default User', 'ClickHouse Server']
 
 ## Removing the default user {#removing-the-default-user}
 
+:::note
+This guide is not applicable to ClickHouse Cloud.
+:::
+
 In this guide, we're going to learn how to remove the `default` user from ClickHouse Server.
 
 We can do this by creating a YAML file (let's call it `remove_default_user.yaml`) that has the following content
@@ -87,4 +91,4 @@ We should see the following line:
 
 ```text
 {} <Debug> ConfigProcessor: Merging configuration file '/etc/clickhouse-server/users.d/remove_default_user.yaml'.
-```
+```