First pass of pd.read_orc changes in tests (#12103)

This PR changes calls going via `pyarrow` and then `to_pandas` to directly call `pd.read_orc`. How-ever since `pd.read_orc` was added in pandas 1.0, we will need to version the call to this constructor. This PR does that.

Partially contributes to #11540

Authors:
  - GALI PREM SAGAR (https://github.com/galipremsagar)

Approvers:
  - Vukasin Milovanovic (https://github.com/vuule)
  - Lawrence Mitchell (https://github.com/wence-)

URL: #12103

python/cudf/cudf/core/_compat.py

@@ -4,7 +4,6 @@
 from packaging import version
 
 PANDAS_VERSION = version.parse(pd.__version__)
-PANDAS_GE_100 = PANDAS_VERSION >= version.parse("1.0")
 PANDAS_GE_110 = PANDAS_VERSION >= version.parse("1.1")
 PANDAS_GE_120 = PANDAS_VERSION >= version.parse("1.2")
 PANDAS_LE_122 = PANDAS_VERSION <= version.parse("1.2.2")

python/cudf/cudf/tests/test_gcs.py

@@ -5,8 +5,6 @@
 
 import numpy as np
 import pandas as pd
-import pyarrow as pa
-import pyarrow.orc
 import pytest
 
 import cudf
@@ -71,5 +69,5 @@ def mock_open(*args, **kwargs):
     monkeypatch.setattr(gcsfs.core.GCSFileSystem, "open", mock_open)
     gdf.to_orc(f"gcs://{gcs_fname}")
 
-    got = pa.orc.ORCFile(local_filepath).read().to_pandas()
+    got = pd.read_orc(local_filepath)
     assert_eq(pdf, got)

python/cudf/cudf/tests/test_hdfs.py

@@ -8,7 +8,6 @@
 import pandas as pd
 import pyarrow as pa
 import pytest
-from pyarrow import orc
 
 import cudf
 from cudf.testing._utils import assert_eq
@@ -212,7 +211,7 @@ def test_read_orc(datadir, hdfs, test_url):
         hd_fpath = f"hdfs://{basedir}/file.orc"
 
     got = cudf.read_orc(hd_fpath)
-    expect = orc.ORCFile(buffer).read().to_pandas()
+    expect = pd.read_orc(buffer)
     assert_eq(expect, got)
 
 
@@ -232,7 +231,7 @@ def test_write_orc(pdf, hdfs, test_url):
 
     assert hdfs.exists(f"{basedir}/test_orc_writer.orc")
     with hdfs.open(f"{basedir}/test_orc_writer.orc", mode="rb") as f:
-        got = orc.ORCFile(f).read().to_pandas()
+        got = pd.read_orc(f)
 
     assert_eq(pdf, got)