fix linting

Author: jorisvandenbossche

pandas/core/dtypes/dtypes.py

@@ -1791,7 +1791,7 @@ def _is_na_fill_value(self) -> bool:
 
     @property
     def _is_numeric(self) -> bool:
-        return not self.subtype == object
+        return self.subtype != object
 
     @property
     def _is_boolean(self) -> bool:

pandas/tests/extension/test_string.py

@@ -212,9 +212,6 @@ def test_compare_scalar(self, data, comparison_op):
         ser = pd.Series(data)
         self._compare_other(ser, data, comparison_op, "abc")
 
-    def test_groupby_extension_apply(self, data_for_grouping, groupby_apply_op):
-        super().test_groupby_extension_apply(data_for_grouping, groupby_apply_op)
-
     def test_combine_add(self, data_repeated, using_infer_string, request):
         dtype = next(data_repeated(1)).dtype
         if using_infer_string and (