Remove tests for polars.plot (#1403)

Co-authored-by: Simon Høxbro Hansen <[email protected]>

hvplot/tests/plotting/testcore.py

@@ -1,6 +1,3 @@
-from packaging.version import Version
-from unittest import SkipTest
-
 import numpy as np
 import pandas as pd
 import hvplot.pandas  # noqa
@@ -96,13 +93,3 @@ def test_series_polars(kind):
     ser = pl.Series(values=np.random.rand(10), name='A')
     assert isinstance(ser, pl.Series)
     ser.hvplot(kind=kind)
-
-
-@pytest.mark.skipif(skip_polar, reason='polars not installed')
-@series_kinds
-def test_series_polars_downstream(kind):
-    if Version(pl.__version__) < Version('0.20.3'):
-        raise SkipTest('plot namespace in Polars introduced in 0.20.3')
-    ser = pl.Series(values=np.random.rand(10), name='A')
-    assert isinstance(ser, pl.Series)
-    ser.plot(kind=kind)

hvplot/tests/testplotting.py

@@ -4,15 +4,11 @@
 
 from unittest import TestCase
 
-import holoviews as hv
 import pandas as pd
-import pytest
 
 from parameterized import parameterized
 
 from hvplot.converter import HoloViewsConverter
-from hvplot.plotting import plot
-from hvplot.tests.util import makeDataFrame
 
 no_args = ['line', 'area', 'hist', 'box', 'kde', 'density', 'bar', 'barh']
 x_y = ['scatter', 'hexbin']
@@ -54,11 +50,3 @@ def test_pandas_dataframe_plot_does_not_implement_pie(self):
 class TestPandasHvplotPlotting(TestPandasHoloviewsPlotting):
     def setUp(self):
         pd.options.plotting.backend = 'hvplot'
-
-
-def test_plot_supports_polars():
-    pl = pytest.importorskip('polars')
-    dfp = pl.DataFrame(makeDataFrame())
-    out = plot(dfp, 'line')
-    assert isinstance(out, hv.NdOverlay)
-    assert out.keys() == dfp.columns