diff --git a/pkg/controller/direct/securesourcemanager/mapper.go b/pkg/controller/direct/securesourcemanager/mapper.go
index ce7911513c..0e3e93381f 100644
--- a/pkg/controller/direct/securesourcemanager/mapper.go
+++ b/pkg/controller/direct/securesourcemanager/mapper.go
@@ -88,9 +88,3 @@ func SecureSourceManagerRepositorySpec_InstanceRef_FromProto(mapCtx *direct.MapC
 	}
 	return &krm.SecureSourceManagerInstanceRef{External: in}
 }
-func SecureSourceManagerInstanceSpec_CaPoolRef_FromProto(mapCtx *direct.MapContext, in string) *krm.PrivateCACAPoolRef {
-	if in == "" {
-		return nil
-	}
-	return &krm.PrivateCACAPoolRef{External: in}
-}