Remove unused dummy_tx variable from FillPSBT

src/wallet/rpcwallet.cpp

@@ -4544,11 +4544,6 @@ bool FillPSBT(const CWallet* pwallet, PartiallySignedTransaction& psbtx, const C
         const CTxOut& out = txConst->vout.at(i);
         PSBTOutput& psbt_out = psbtx.outputs.at(i);
 
-        // Dummy tx so we can use ProduceSignature to get stuff out
-        CMutableTransaction dummy_tx;
-        dummy_tx.vin.push_back(CTxIn());
-        dummy_tx.vout.push_back(CTxOut());
-
         // Fill a SignatureData with output info
         SignatureData sigdata;
         psbt_out.FillSignatureData(sigdata);