Fixed mypy error in test_json.py

The error is due to the fact that the builtins.staticmethod type defined
 in extension.base.base.BaseExtensionTests does not match the function
type in extension.json.test_json.BaseJSON. I don't see a possibility for
a type hint fix without changing the structure of the code. One way
would be to replace the call of staticmethod by function definitions
that call the corresponding methods.
Here I propose an easier suppression of the error using type: Any.
What do you think?

pandas/tests/extension/json/test_json.py

@@ -93,7 +93,6 @@ def assert_series_equal(self, left, right, **kwargs):
                 name=right.name,
             )
         tm.assert_series_equal(left, right, **kwargs)
-
     def assert_frame_equal(self, left, right, *args, **kwargs):
         tm.assert_index_equal(
             left.columns,

setup.cfg

@@ -160,9 +160,6 @@ ignore_errors=True
 [mypy-pandas.tests.extension.json.array]
 ignore_errors=True
 
-[mypy-pandas.tests.extension.json.test_json]
-ignore_errors=True
-
 [mypy-pandas.tests.frame.test_constructors]
 ignore_errors=True