hive-c0re: deliver scheduled prompts via push_todo, not a broker message

hive-c0re/src/stores/broker.rs

@@ -354,25 +354,6 @@ impl Broker {
         Ok(u64::try_from(n.max(0)).unwrap_or(0))
     }
 
-    /// Returns true when the recipient already has at least one
-    /// undelivered message from `sender` with exactly `body` in the
-    /// broker. Used by the scheduler to skip re-delivery of the same
-    /// scheduled prompt without blocking distinct schedules whose
-    /// bodies differ.
-    pub fn has_pending_with_body(&self, recipient: &str, sender: &str, body: &str) -> Result<bool> {
-        let conn = self.conn.lock().unwrap();
-        // An `ack_until`-closed pending row is dead — it must not
-        // suppress a fresh scheduled delivery of the same body.
-        let n: i64 = conn.query_row(
-            "SELECT COUNT(*) FROM messages
-              WHERE recipient = ?1 AND sender = ?2 AND body = ?3
-                AND delivered_at IS NULL AND acked_at IS NULL",
-            params![recipient, sender, body],
-            |row| row.get(0),
-        )?;
-        Ok(n > 0)
-    }
-
     /// Send a "your parent changed from X to Y" notification to `child`,
     /// coalescing with any existing undelivered one so that multiple moves
     /// while the agent is offline collapse into a single message spanning