Remove no longer necessary async from monero SignatableTransaction::sign

coins/monero/src/wallet/send/mod.rs

@@ -805,8 +805,7 @@ impl SignableTransaction {
   }
 
   /// Sign this transaction.
-  // TODO: Remove async
-  pub async fn sign<R: RngCore + CryptoRng>(
+  pub fn sign<R: RngCore + CryptoRng>(
     mut self,
     rng: &mut R,
     spend: &Zeroizing<Scalar>,

coins/monero/tests/runner.rs

@@ -228,7 +228,7 @@ macro_rules! test {
             let keys = keys.clone();
             async move {
               if !multisig {
-                tx.sign(&mut OsRng, &spend).await.unwrap()
+                tx.sign(&mut OsRng, &spend).unwrap()
               } else {
                 #[cfg(not(feature = "multisig"))]
                 panic!("Multisig branch called without the multisig feature");