chore: remove addition of dummy ops in mock circuit producer

barretenberg/cpp/src/barretenberg/client_ivc/mock_circuit_producer.hpp

@@ -180,13 +180,6 @@ class ClientIVCMockCircuitProducer {
     {
         ClientCircuit circuit{ ivc.goblin.op_queue };
         MockCircuits::construct_arithmetic_circuit(circuit, log2_num_gates);
-
-        // TODO(https://github.com/AztecProtocol/barretenberg/issues/911): We require goblin ops to be added to the
-        // function circuit because we cannot support zero commtiments. While the builder handles this at
-        // finalisation stage via the add_gates_to_ensure_all_polys_are_non_zero function for other MegaHonk
-        // circuits (where we don't explicitly need to add goblin ops), in ClientIVC merge proving happens prior to
-        // folding where the absense of goblin ecc ops will result in zero commitments.
-        MockCircuits::construct_goblin_ecc_op_circuit(circuit);
         return circuit;
     }