remove obs aiops pages from toc

Author: colleenmcginnis

explore-analyze/toc.yml

@@ -231,12 +231,6 @@ toc:
           - file: machine-learning/machine-learning-in-kibana/xpack-ml-anomalies.md
           - file: machine-learning/machine-learning-in-kibana/xpack-ml-dfanalytics.md
           - file: machine-learning/machine-learning-in-kibana/xpack-ml-aiops.md
-            children:
-              - file: machine-learning/machine-learning-in-kibana/observability-aiops-detect-anomalies.md
-              - file: machine-learning/machine-learning-in-kibana/observability-aiops-tune-anomaly-detection-job.md
-              - file: machine-learning/machine-learning-in-kibana/observability-aiops-forecast-anomalies.md
-              - file: machine-learning/machine-learning-in-kibana/observability-aiops-analyze-spikes.md
-              - file: machine-learning/machine-learning-in-kibana/observability-aiops-detect-change-points.md
           - file: machine-learning/machine-learning-in-kibana/inference-processing.md
   - file: ai-assistant.md
   - file: discover.md