docs: [release-2.9.x] Remove docs about configs that are not released…

… yet (#12111) (#12115)

Co-authored-by: J Stickler <[email protected]>

docs/sources/get-started/labels/structured-metadata.md

@@ -36,18 +36,6 @@ See the [Promtail: Structured metadata stage]({{< relref "../../send-data/promta
 
 With Loki version 1.2.0, support for structured metadata has been added to the Logstash output plugin. For more information, see [logstash]({{< relref "../../send-data/logstash/_index.md" >}}).
 
-{{% admonition type="warning" %}}
-There are defaults for how much structured metadata can be attached per log line.
-```
-# Maximum size accepted for structured metadata per log line.
-# CLI flag: -limits.max-structured-metadata-size
-[max_structured_metadata_size: <int> | default = 64KB]
-
-# Maximum number of structured metadata entries per log line.
-# CLI flag: -limits.max-structured-metadata-entries-count
-[max_structured_metadata_entries_count: <int> | default = 128]
-```
-{{% /admonition %}}
 
 ## Querying structured metadata