chore: rm unused lines

[maelle]

No description provided.

[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 27ffa11 is merged into main:

• ✔️as_adjacency_matrix: 783ms -> 783ms [-1.69%, +1.73%]
• ✔️as_biadjacency_matrix: 755ms -> 757ms [-0.81%, +1.28%]
• ✔️as_data_frame_both: 1.49ms -> 1.48ms [-2.24%, +0.65%]
• ✔️as_long_data_frame: 3.88ms -> 3.9ms [-0.41%, +1.31%]
• ✔️es_attr_filter: 2.82ms -> 2.82ms [-2.73%, +2.67%]
• ✔️graph_from_adjacency_matrix: 127ms -> 125ms [-4.9%, +2.55%]
• ✔️graph_from_data_frame: 3.35ms -> 3.33ms [-1.71%, +0.56%]
• ✔️vs_attr_filter: 1.59ms -> 1.58ms [-3.59%, +2.46%]
• ✔️vs_by_name: 1.09ms -> 1.11ms [-1.12%, +4.06%]
  Further explanation regarding interpretation and methodology can be found in the documentation.