[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

pandas/tests/tslibs/test_array_to_datetime.py

@@ -302,7 +302,6 @@ def test_datetime_subclass(klass):
 
 import pandas as pd
 from pandas import Timestamp
-import pandas._testing as tm
 
 
 def test_to_datetime_format_long_string_gh54958():
@@ -314,4 +313,4 @@ def test_to_datetime_format_long_string_gh54958():
     ser = pd.Series(["2023010100"])
     expected = pd.Series([Timestamp("2023-01-01")])
     result = pd.to_datetime(ser, format="%Y%m%d")
-    tm.assert_series_equal(result, expected)
+    tm.assert_series_equal(result, expected)