Removed error when inputing values for anything that isn't an electron or a photon into a fastsim with predicted weight extrapolation

As described here !67695 (comment 7405876) I introduced an error message for anything that wasn't a photon or an electron when creating inputs for predicted weight extrapolation.

This is a one hot vector, but it should just be left entirely blank for anything else. Removing the error message and leaving the one hot vector blank.

Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimEvent/src/TFCSPredictExtrapWeights.cxx

@@ -187,9 +187,6 @@ TFCSPredictExtrapWeights::prepareInputs(TFCSSimulationState &simulstate,
     flat_inputs["pdgId"] = 1; // one hot enconding
   } else if (is_match_pdgid(11) || is_match_pdgid(-11)) {
     flat_inputs["pdgId"] = 0; // one hot enconding
-  } else {
-    ATH_MSG_ERROR("have no one-hot encoding for pdgId; pottential issue with "
-                 "predicted weights.");
   }
   inputs["dense_input"] = flat_inputs;