remove redundant fixture def

Author: TrevorBergeron

tests/system/large/ml/test_linear_model.py

@@ -13,22 +13,12 @@
 # limitations under the License.
 
 import pandas as pd
-import pytest
 
-from bigframes.ml import core, model_selection
+from bigframes.ml import model_selection
 import bigframes.ml.linear_model
 from bigframes.testing import utils
 
 
-@pytest.fixture(scope="function")
-def penguins_linear_model_w_global_explain(
-    penguins_bqml_linear_model: core.BqmlModel,
-) -> bigframes.ml.linear_model.LinearRegression:
-    bf_model = bigframes.ml.linear_model.LinearRegression(enable_global_explain=True)
-    bf_model._bqml_model = penguins_bqml_linear_model
-    return bf_model
-
-
 def test_linear_regression_configure_fit_score(penguins_df_default_index, dataset_id):
     model = bigframes.ml.linear_model.LinearRegression()