Remove custom argparse action

slither/__main__.py

@@ -288,12 +288,6 @@ def parse_args(detector_classes, printer_classes):  # pylint: disable=too-many-s
     usage += "\t- 0x.. // a contract on mainet\n"
     usage += f"\t- NETWORK:0x.. // a contract on a different network. Supported networks: {','.join(x[:-1] for x in SUPPORTED_NETWORK)}\n"
 
-    class NoFailPedanticAction(argparse.Action):
-        """Custom argparse action that sets args.fail_pedantic to False if --no-fail-pedantic is used"""
-
-        def __call__(self, parser, namespace, values, option_string=None):
-            setattr(namespace, "fail_pedantic", False)
-
     parser = argparse.ArgumentParser(
         description="For usage information, see https://github.com/crytic/slither/wiki/Usage",
         usage=usage,
@@ -411,8 +405,8 @@ def parse_args(detector_classes, printer_classes):  # pylint: disable=too-many-s
     group_detector.add_argument(
         "--no-fail-pedantic",
         help="Don't fail immediately if a finding is detected",
-        nargs=0,
-        action=NoFailPedanticAction,
+        dest="fail_pedantic",
+        action="store_false",
         required=False,
     )