Revert "feat: add test for arrow C stream schema selection in DataFrame"

This reverts commit bf0ab48.

Author: kosiew

python/tests/test_dataframe.py

@@ -46,8 +46,6 @@
 from datafusion.expr import Window
 from pyarrow.csv import write_csv
 
-pa_cffi = pytest.importorskip("pyarrow.cffi")
-
 MB = 1024 * 1024
 
 
@@ -1639,44 +1637,6 @@ def test_arrow_c_stream_reader(df):
     assert table.equals(expected)
 
 
-def test_arrow_c_stream_schema_selection(fail_collect):
-    ctx = SessionContext()
-
-    batch = pa.RecordBatch.from_arrays(
-        [
-            pa.array([1, 2]),
-            pa.array([3, 4]),
-            pa.array([5, 6]),
-        ],
-        names=["a", "b", "c"],
-    )
-    df = ctx.create_dataframe([[batch]])
-
-    requested_schema = pa.schema([("c", pa.int64()), ("a", pa.int64())])
-
-    c_schema = pa_cffi.ffi.new("struct ArrowSchema*")
-    address = int(pa_cffi.ffi.cast("uintptr_t", c_schema))
-    requested_schema._export_to_c(address)
-    capsule_new = ctypes.pythonapi.PyCapsule_New
-    capsule_new.restype = ctypes.py_object
-    capsule_new.argtypes = [ctypes.c_void_p, ctypes.c_char_p, ctypes.c_void_p]
-    schema_capsule = capsule_new(ctypes.c_void_p(address), b"arrow_schema", None)
-
-    reader = pa.RecordBatchReader._import_from_c_capsule(
-        df.__arrow_c_stream__(schema_capsule)
-    )
-
-    assert reader.schema == requested_schema
-
-    batches = list(reader)
-
-    assert len(batches) == 1
-    expected_batch = pa.record_batch(
-        [pa.array([5, 6]), pa.array([1, 2])], names=["c", "a"]
-    )
-    assert batches[0].equals(expected_batch)
-
-
 def test_to_pylist(df):
     # Convert datafusion dataframe to Python list
     pylist = df.to_pylist()