fix: remove unused imports in test_bounded_concurrent_batches

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sumedhsakdeo

tests/io/test_bounded_concurrent_batches.py

@@ -206,7 +206,7 @@ def batch_fn(t: FileScanTask) -> Iterator[pa.RecordBatch]:
 def test_concurrent_with_limit_via_arrowscan(tmpdir: str) -> None:
     """Test concurrent_files with limit through ArrowScan integration."""
     from pyiceberg.expressions import AlwaysTrue
-    from pyiceberg.io.pyarrow import ArrowScan, PyArrowFileIO, schema_to_pyarrow, write_file
+    from pyiceberg.io.pyarrow import ArrowScan, PyArrowFileIO
     from pyiceberg.manifest import DataFileContent, FileFormat
     from pyiceberg.partitioning import PartitionSpec
     from pyiceberg.schema import Schema