[XLA] Throw away TilingSpecification in the TransposedDotTiledHloSchedule.

After relaxing the constraints related to the iteration space in a recent
change, this is no longer necessary.

PiperOrigin-RevId: 820766539

Author: bchetioui

xla/codegen/tiling/tiled_hlo_schedule.cc

@@ -191,8 +191,7 @@ TransposedDotTiledHloSchedule::Create(
   TF_ASSIGN_OR_RETURN(int64_t n_dim_id, tiling_specification.ParameterIndex(
                                             dot, n_local_parameter_index));
 
-  return TransposedDotTiledHloSchedule(tiling_specification, m_dim_id,
-                                       n_dim_id);
+  return TransposedDotTiledHloSchedule(m_dim_id, n_dim_id);
 }
 
 absl::StatusOr<IndexingMap> TransposedDotTiledHloSchedule::Schedule(

xla/codegen/tiling/tiled_hlo_schedule.h

@@ -103,14 +103,9 @@ class TransposedDotTiledHloSchedule : public TiledHloSchedule {
       const TilingSpecification& tiling_specification);
 
  private:
-  TransposedDotTiledHloSchedule(const TilingSpecification& tiling_specification,
-                                int64_t m_dim_id, int64_t n_dim_id)
-      : tiling_specification_(tiling_specification),
-        m_dim_id_(m_dim_id),
-        n_dim_id_(n_dim_id) {}
-
-  // The `TilingSpecification` used to construct this schedule.
-  TilingSpecification tiling_specification_;
+  TransposedDotTiledHloSchedule(int64_t m_dim_id, int64_t n_dim_id)
+      : m_dim_id_(m_dim_id), n_dim_id_(n_dim_id) {}
+
   // The index of the `m` dimension within the parameter mapping of the
   // `TilingSpecification`.
   int64_t m_dim_id_;