Fix some unit test deprecation warnings

[adamgreg]

No description provided.

[codecov-commenter]

Codecov Report

Merging #3503 (511cc7e) into master (e3a89a5) will increase coverage by 0.04%.
The diff coverage is n/a.

❗ Current head 511cc7e differs from pull request most recent head 58bed79. Consider uploading reports for the commit 58bed79 to get more accurate results

@@            Coverage Diff             @@
##           master    #3503      +/-   ##
==========================================
+ Coverage   77.66%   77.71%   +0.04%     
==========================================
  Files         411      411              
  Lines       70530    70373     -157     
==========================================
- Hits        54778    54691      -87     
+ Misses      15752    15682      -70     

Impacted Files	Coverage Δ
py-polars/polars/internals/frame.py	89.45% <ø> (+0.76%)	⬆️
...core/src/chunked_array/logical/categorical/from.rs	21.62% <0.00%> (-18.92%)	⬇️
polars/polars-lazy/src/logical_plan/aexpr.rs	80.72% <0.00%> (-0.61%)	⬇️
...src/physical_plan/executors/groupby_partitioned.rs	88.42% <0.00%> (-0.53%)	⬇️
...lars/polars-core/src/chunked_array/ops/sort/mod.rs	91.97% <0.00%> (-0.18%)	⬇️
...ars/polars-core/src/chunked_array/ops/aggregate.rs	94.20% <0.00%> (-0.10%)	⬇️
polars/polars-core/src/series/mod.rs	58.09% <0.00%> (+0.13%)	⬆️
polars/polars-core/src/datatypes.rs	70.54% <0.00%> (+0.19%)	⬆️
...olars/polars-core/src/frame/groupby/into_groups.rs	59.87% <0.00%> (+0.60%)	⬆️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e3a89a5...58bed79. Read the comment docs.

[ritchie46]

Thanks a lot!❤️