revert openpyxl test changes (pandas-dev#30033)

Author: WillAyd

pandas/tests/io/excel/test_openpyxl.py

@@ -1,11 +1,8 @@
-from distutils.version import LooseVersion
 import os
 
 import numpy as np
 import pytest
 
-from pandas.compat import PY37, is_platform_mac
-
 import pandas as pd
 from pandas import DataFrame
 import pandas.util.testing as tm
@@ -16,8 +13,6 @@
 
 pytestmark = pytest.mark.parametrize("ext", [".xlsx"])
 
-openpyxl_gt301 = LooseVersion(openpyxl.__version__) > LooseVersion("3.0.1")
-
 
 def test_to_excel_styleconverter(ext):
     from openpyxl import styles
@@ -86,9 +81,6 @@ def test_write_cells_merge_styled(ext):
         assert xcell_a2.font == openpyxl_sty_merged
 
 
-@pytest.mark.xfail(
-    openpyxl_gt301 and PY37 and is_platform_mac(), reason="broken change in openpyxl"
-)
 @pytest.mark.parametrize(
     "mode,expected", [("w", ["baz"]), ("a", ["foo", "bar", "baz"])]
 )
@@ -115,9 +107,6 @@ def test_write_append_mode(ext, mode, expected):
             assert wb2.worksheets[index]["A1"].value == cell_value
 
 
-@pytest.mark.xfail(
-    openpyxl_gt301 and PY37 and is_platform_mac(), reason="broken change in openpyxl"
-)
 def test_to_excel_with_openpyxl_engine(ext, tmpdir):
     # GH 29854
     # TODO: Fix this once newer version of openpyxl fixes the bug