Unskip test_json.test_tool

Lib/test/test_json/test_tool.py

@@ -7,7 +7,6 @@ from test import support
 from test.support.script_helper import assert_python_ok
 
 
-@unittest.skip("TODO: RUSTPYTHON, rustpython -X faulthandler")
 class TestTool(unittest.TestCase):
     data = """