Remove dead code

swap/src/protocol/bob/state.rs

@@ -588,18 +588,6 @@ impl State6 {
         Ok(())
     }
 
-    pub async fn wait_for_cancel_timelock_to_expire(
-        &self,
-        bitcoin_wallet: &bitcoin::Wallet,
-    ) -> Result<()> {
-        bitcoin_wallet
-            .watch_until_status(&self.tx_lock, |status| {
-                status.is_confirmed_with(self.cancel_timelock)
-            })
-            .await?;
-        Ok(())
-    }
-
     pub fn tx_lock_id(&self) -> bitcoin::Txid {
         self.tx_lock.txid()
     }