docs: drop TOC entries for deleted orchestrator walkthrough/transitions pages

docs/src/SUMMARY.md

diff --git a/docs/src/SUMMARY.md b/docs/src/SUMMARY.md
index 2aae5a3..b7c13b5 100644
--- a/docs/src/SUMMARY.md
+++ b/docs/src/SUMMARY.md
@@ -35,5 +35,3 @@
   * [Orchestrator](./design/orchestrator/orchestrator-overview.md)
     * [Verification Model](./design/orchestrator/orchestrator-model.md)
     * [State Machine](./design/orchestrator/orchestrator-machine.md)
-    * [State Machine Walkthrough](./design/orchestrator/orchestrator-sm-walkthru.md)
-    * [State Machine Transitions](./design/orchestrator/orchestrator-sm-transitions.md)