remove unknown bucket

Author: mdbirnstiehl

solutions/observability/unknown-bucket/aws-metrics.md

@@ -368,12 +368,6 @@ toc:
       - file: observability/data-set-quality-monitoring.md
       - file: observability/observability-ai-assistant.md
       - file: observability/tools-and-apis.md
-      - file: observability/unknown-bucket.md
-        children:
-          - file: observability/unknown-bucket/host-metrics.md
-          - file: observability/unknown-bucket/container-metrics.md
-          - file: observability/unknown-bucket/kubernetes-pod-metrics.md
-          - file: observability/unknown-bucket/aws-metrics.md
   - file: security.md
     children:
       - file: security/elastic-security-serverless.md