Clean up two orphaned notes in Unassigned/Needs Triage

Left over from testing before /delete-task also removed linked notes
(via the new sourceTaskId field, not rendered, ignored on this end).
Confirmed with Mckinley before removal, per Input Interface.

index.html

@@ -6415,10 +6415,7 @@
       id: "open-items-unassigned",
       label: "Unassigned / Needs Triage",
       subtasks: [],
-      notes: [
-        { date: "2026-08-25", source: "Input Interface (Mckinley)", text: "New task submitted via Input Interface: \"this is an unassigned task\"" },
-        { date: "2026-08-25", source: "Input Interface (Peter)", text: "New task submitted via Input Interface: \"Real end-to-end delete-flow verification (2026-08-25)\"" }
-      ],
+      notes: [],
       reports: []
     },
     {