chore(typing): remove unused ignores

[dangotbanned]

What type of PR is this? (check all applicable)

• 💾 Refactor
• ✨ Feature
• 🐛 Bug Fix
• 🔧 Optimization
• 📝 Documentation
• ✅ Test
• 🐳 Other

Checklist

• Code follows style guide (ruff)
• Tests added
• Documented the changes

If you have comments or can explain your changes, please do so below

shape: (9, 7)
┌───────────────────────────────┬──────┬────────┬───────────────────────────────┬──────┬───────────────┬──────────┐
│ file                          ┆ line ┆ column ┆ message                       ┆ hint ┆ code          ┆ severity │
│ ---                           ┆ ---  ┆ ---    ┆ ---                           ┆ ---  ┆ ---           ┆ ---      │
│ str                           ┆ i64  ┆ i64    ┆ str                           ┆ str  ┆ str           ┆ str      │
╞═══════════════════════════════╪══════╪════════╪═══════════════════════════════╪══════╪═══════════════╪══════════╡
│ narwhals/utils.py             ┆ 192  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/utils.py             ┆ 204  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/utils.py             ┆ 209  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_duckdb/dataframe.py ┆ 254  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_arrow/dataframe.py  ┆ 112  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_arrow/dataframe.py  ┆ 134  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_arrow/dataframe.py  ┆ 305  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_arrow/dataframe.py  ┆ 679  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
│ narwhals/_arrow/series.py     ┆ 358  ┆ -1     ┆ Unused "type: ignore" comment ┆ null ┆ unused-ignore ┆ error    │
└───────────────────────────────┴──────┴────────┴───────────────────────────────┴──────┴───────────────┴──────────┘

[dangotbanned]

This isn't a typing issue, it is directly caused by pre-commit not having access to any dependencies (#1966)

[MarcoGorelli]

thanks @dangotbanned !