Overview

Remove the unused SyncStatusExt runtime extension, the sync-status-monitor background task, and all associated is_syncing plumbing from the node.

This code was registered as a Substrate host extension but never read by any consumer — the ledger, pallets, and runtime never call SyncStatusExt::is_syncing(). Historical UTXO ordering for preprod/preview blocks is handled by the per-transaction override data files (utxo_ordering_override.rs), which remain intact.

🗹 TODO before merging

• Ready

📌 Submission Checklist

• Changes are backward-compatible (or flagged if breaking)
• Pull request description explains why the change is needed
• Self-reviewed the diff
• I have included a change file, or skipped for this reason:
• If the changes introduce a new feature, I have bumped the node minor version
• Update documentation (if relevant)
• Updated AGENTS.md if build commands, architecture, or workflows changed
• No new todos introduced

🧪 Testing Evidence

cargo clippy -p midnight-node -p midnight-primitives-ledger passes cleanly.

• Additional tests are provided (if possible)

🔱 Fork Strategy

• Node Runtime Update
• Node Client Update
• Other:
• N/A

Links