diff --git a/tools/cellxgene_census_builder/src/cellxgene_census_builder/build_soma/experiment_builder.py b/tools/cellxgene_census_builder/src/cellxgene_census_builder/build_soma/experiment_builder.py
index 69a2bcfcd..9f0411b7f 100644
--- a/tools/cellxgene_census_builder/src/cellxgene_census_builder/build_soma/experiment_builder.py
+++ b/tools/cellxgene_census_builder/src/cellxgene_census_builder/build_soma/experiment_builder.py
@@ -52,10 +52,8 @@
 
 @attrs.define
 class PresenceResult:
-    dataset_id: str
     dataset_soma_joinid: int
     eb_name: str
-    data: npt.NDArray[np.bool_]
     cols: npt.NDArray[np.int64]
 
 
@@ -67,10 +65,6 @@ class AxisStats:
     var_stats: pd.DataFrame
 
 
-AccumulateXResult = tuple[PresenceResult, AxisStats]
-AccumulateXResults = Sequence[AccumulateXResult]
-
-
 def _assert_open_for_write(obj: somacore.SOMAObject | None) -> None:
     assert obj is not None
     assert obj.exists(obj.uri)
@@ -460,10 +454,8 @@ def compute_X_file_stats(
     var_stats["n_measured_obs"] = n_obs
     res["presence"].append(
         PresenceResult(
-            dataset_id,
             dataset_soma_joinid,
             eb_name,
-            (var_stats.nnz > 0).to_numpy(),
             var_stats.index.to_numpy(),
         ),
     )