remove test as the warning is not expected anymore

Author: SvenKlaassen

doubleml/tests/test_exceptions.py

@@ -986,7 +986,6 @@ def predict(self, X):
 @pytest.mark.ci
 def test_doubleml_exception_learner():
     err_msg_prefix = "Invalid learner provided for ml_l: "
-    warn_msg_prefix = "Learner provided for ml_l is probably invalid: "
 
     msg = err_msg_prefix + "provide an instance of a learner instead of a class."
     with pytest.raises(TypeError, match=msg):
@@ -1005,12 +1004,6 @@ def test_doubleml_exception_learner():
     with pytest.warns(UserWarning):
         _ = DoubleMLIRM(dml_data_irm, Lasso(), _DummyNoClassifier())
 
-    # ToDo: Currently for ml_l (and others) we only check whether the learner can be identified as regressor. However,
-    # we do not check whether it can instead be identified as classifier, which could be used to throw an error.
-    msg = warn_msg_prefix + r"LogisticRegression\(\) is \(probably\) no regressor."
-    with pytest.warns(UserWarning, match=msg):
-        _ = DoubleMLPLR(dml_data, LogisticRegression(), Lasso())
-
     # we allow classifiers for ml_m in PLR, but only for binary treatment variables
     msg = (
         r"The ml_m learner LogisticRegression\(\) was identified as classifier "