diff --git a/golang/cosmos/proto/agoric/swingset/genesis.proto b/golang/cosmos/proto/agoric/swingset/genesis.proto
index 6ebba42a00a4..8a178e4e12ed 100644
--- a/golang/cosmos/proto/agoric/swingset/genesis.proto
+++ b/golang/cosmos/proto/agoric/swingset/genesis.proto
@@ -17,10 +17,6 @@ message GenesisState {
     repeated SwingStoreExportDataEntry swing_store_export_data = 4 [
         (gogoproto.jsontag)    = "swingStoreExportData"
     ];
-
-    repeated SwingStoreArtifact swing_store_artifacts = 5 [
-        (gogoproto.jsontag)    = "swingStoreArtifacts"
-    ];
 }
 
 // A SwingStore "export data" entry.
diff --git a/golang/cosmos/x/swingset/types/genesis.pb.go b/golang/cosmos/x/swingset/types/genesis.pb.go
index 978544db369c..47d94b1e51fb 100644
--- a/golang/cosmos/x/swingset/types/genesis.pb.go
+++ b/golang/cosmos/x/swingset/types/genesis.pb.go
@@ -28,7 +28,6 @@ type GenesisState struct {
 	Params               Params                       `protobuf:"bytes,2,opt,name=params,proto3" json:"params"`
 	State                State                        `protobuf:"bytes,3,opt,name=state,proto3" json:"state"`
 	SwingStoreExportData []*SwingStoreExportDataEntry `protobuf:"bytes,4,rep,name=swing_store_export_data,json=swingStoreExportData,proto3" json:"swingStoreExportData"`
-	SwingStoreArtifacts  []*SwingStoreArtifact        `protobuf:"bytes,5,rep,name=swing_store_artifacts,json=swingStoreArtifacts,proto3" json:"swingStoreArtifacts"`
 }
 
 func (m *GenesisState) Reset()         { *m = GenesisState{} }
@@ -85,13 +84,6 @@ func (m *GenesisState) GetSwingStoreExportData() []*SwingStoreExportDataEntry {
 	return nil
 }
 
-func (m *GenesisState) GetSwingStoreArtifacts() []*SwingStoreArtifact {
-	if m != nil {
-		return m.SwingStoreArtifacts
-	}
-	return nil
-}
-
 // A SwingStore "export data" entry.
 type SwingStoreExportDataEntry struct {
 	Key   string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
@@ -153,31 +145,28 @@ func init() {
 func init() { proto.RegisterFile("agoric/swingset/genesis.proto", fileDescriptor_49b057311de9d296) }
 
 var fileDescriptor_49b057311de9d296 = []byte{
-	// 371 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x52, 0xcd, 0x4e, 0xea, 0x40,
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-	0x02, 0x00, 0x00,
+	// 334 bytes of a gzipped FileDescriptorProto
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+	0xfc, 0x37, 0x00, 0x00, 0xff, 0xff, 0x94, 0xe9, 0x22, 0x36, 0x09, 0x02, 0x00, 0x00,
 }
 
 func (m *GenesisState) Marshal() (dAtA []byte, err error) {
@@ -200,20 +189,6 @@ func (m *GenesisState) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
-	if len(m.SwingStoreArtifacts) > 0 {
-		for iNdEx := len(m.SwingStoreArtifacts) - 1; iNdEx >= 0; iNdEx-- {
-			{
-				size, err := m.SwingStoreArtifacts[iNdEx].MarshalToSizedBuffer(dAtA[:i])
-				if err != nil {
-					return 0, err
-				}
-				i -= size
-				i = encodeVarintGenesis(dAtA, i, uint64(size))
-			}
-			i--
-			dAtA[i] = 0x2a
-		}
-	}
 	if len(m.SwingStoreExportData) > 0 {
 		for iNdEx := len(m.SwingStoreExportData) - 1; iNdEx >= 0; iNdEx-- {
 			{
@@ -315,12 +290,6 @@ func (m *GenesisState) Size() (n int) {
 			n += 1 + l + sovGenesis(uint64(l))
 		}
 	}
-	if len(m.SwingStoreArtifacts) > 0 {
-		for _, e := range m.SwingStoreArtifacts {
-			l = e.Size()
-			n += 1 + l + sovGenesis(uint64(l))
-		}
-	}
 	return n
 }
 
@@ -476,40 +445,6 @@ func (m *GenesisState) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 5:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field SwingStoreArtifacts", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowGenesis
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthGenesis
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthGenesis
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.SwingStoreArtifacts = append(m.SwingStoreArtifacts, &SwingStoreArtifact{})
-			if err := m.SwingStoreArtifacts[len(m.SwingStoreArtifacts)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipGenesis(dAtA[iNdEx:])