Remove outdated einsum test parametrization

Author: ValerianRey

tests/unit/sparse/test_structured_sparse_tensor.py

@@ -61,7 +61,6 @@ def test_to_dense2():
             [1, 2],
             [0, 2],
         ),
-        ([2, 3], tensor([[3, 1]]), [6], tensor([[1]]), [0], [0], []),
         (
             [6, 2, 3],
             tensor([[1, 0, 0], [0, 1, 0], [0, 0, 1]]),