Revert "skip test_groupby_literal_in_agg if polars>=1.7.1"

This reverts commit 1b5cb1a.

python/cudf_polars/tests/test_groupby.py

@@ -5,7 +5,6 @@
 import itertools
 
 import pytest
-from packaging import version
 
 import polars as pl
 
@@ -169,13 +168,7 @@ def test_groupby_nan_minmax_raises(op):
     "expr",
     [
         pl.lit(1).alias("value"),
-        pytest.param(
-            pl.lit([[4, 5, 6]]).alias("value"),
-            marks=pytest.mark.xfail(
-                condition=version.parse(pl.__version__) >= version.parse("1.7.1"),
-                reason="Broken in polars 1.7.1",
-            ),
-        ),
+        pl.lit([[4, 5, 6]]).alias("value"),
         pl.col("float") * (1 - pl.col("int")),
         [pl.lit(2).alias("value"), pl.col("float") * 2],
     ],