[SPARK-56084][PYTHON] Remove unused ArrowStreamGroupUDFSerializer#55963
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[SPARK-56084][PYTHON] Remove unused ArrowStreamGroupUDFSerializer#55963Yicong-Huang wants to merge 1 commit into
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### What changes were proposed in this pull request? Delete `ArrowStreamGroupUDFSerializer` from `python/pyspark/sql/pandas/serializers.py`. ### Why are the changes needed? `ArrowStreamGroupUDFSerializer` is no longer used after SPARK-55608 refactored `SQL_GROUPED_MAP_ARROW_UDF` / `SQL_GROUPED_MAP_ARROW_ITER_UDF` to use `ArrowStreamGroupSerializer` directly, and SPARK-56860 removed its only subclass `CogroupArrowUDFSerializer`. This class can be safely deleted. Part of SPARK-55384. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Existing tests: `pyspark.sql.tests.arrow.test_arrow_grouped_map`. ### Was this patch authored or co-authored using generative AI tooling? No. Closes #55963 from Yicong-Huang/SPARK-56084/cleanup/grouped-arrow-udf-serializer. Authored-by: Yicong Huang <17627829+Yicong-Huang@users.noreply.github.com> Signed-off-by: Ruifeng Zheng <ruifengz@foxmail.com> (cherry picked from commit 164dbfb) Signed-off-by: Ruifeng Zheng <ruifengz@foxmail.com>
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What changes were proposed in this pull request?
Delete
ArrowStreamGroupUDFSerializerfrompython/pyspark/sql/pandas/serializers.py.Why are the changes needed?
ArrowStreamGroupUDFSerializeris no longer used after SPARK-55608 refactoredSQL_GROUPED_MAP_ARROW_UDF/SQL_GROUPED_MAP_ARROW_ITER_UDFto useArrowStreamGroupSerializerdirectly, and SPARK-56860 removed its only subclassCogroupArrowUDFSerializer. This class can be safely deleted.Part of SPARK-55384.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Existing tests:
pyspark.sql.tests.arrow.test_arrow_grouped_map.Was this patch authored or co-authored using generative AI tooling?
No.