Fix scaled_matrices_2_plus_rows

- It should not contain zero matrices

Author: ValerianRey

tests/unit/aggregation/_inputs.py

@@ -106,9 +106,7 @@ def _generate_semi_orthonormal_complement(Q: Tensor) -> Tensor:
 scaled_matrices = [scale * matrix for scale in _scales for matrix in matrices]
 zero_matrices = [torch.zeros([m, n]) for m, n in _zero_matrices_shapes]
 matrices_2_plus_rows = [matrix for matrix in matrices + zero_matrices if matrix.shape[0] >= 2]
-scaled_matrices_2_plus_rows = [
-    matrix for matrix in scaled_matrices + zero_matrices if matrix.shape[0] >= 2
-]
+scaled_matrices_2_plus_rows = [matrix for matrix in scaled_matrices if matrix.shape[0] >= 2]
 strong_stationary_matrices = [
     _generate_strong_stationary_matrix(m, n) for m, n in _stationary_matrices_shapes
 ]