TT#116101 bin/check_sip.py: fix error in argparse

> root@09127d41b4c6:/code# ./bin/check_sip.py
> Traceback (most recent call last):
>  File "/code/./bin/check_sip.py", line 259, in <module>
>    args = parser.parse_args()
>  File "/usr/lib/python3.9/argparse.py", line 1830, in parse_args
>    args, argv = self.parse_known_args(args, namespace)
>  File "/usr/lib/python3.9/argparse.py", line 1863, in parse_known_args
>    namespace, args = self._parse_known_args(args, namespace)
>  File "/usr/lib/python3.9/argparse.py", line 2100, in _parse_known_args
>    self.error(_('the following arguments are required: %s') %
>  File "/usr/lib/python3.9/argparse.py", line 2585, in error
>    self.print_usage(_sys.stderr)
>  File "/usr/lib/python3.9/argparse.py", line 2555, in print_usage
>    self._print_message(self.format_usage(), file)
>  File "/usr/lib/python3.9/argparse.py", line 2521, in format_usage
>    return formatter.format_help()
>  File "/usr/lib/python3.9/argparse.py", line 295, in format_help
>    help = self._root_section.format_help()
>  File "/usr/lib/python3.9/argparse.py", line 226, in format_help
>    item_help = join([func(*args) for func, args in self.items])
>  File "/usr/lib/python3.9/argparse.py", line 226, in <listcomp>
>    item_help = join([func(*args) for func, args in self.items])
>  File "/usr/lib/python3.9/argparse.py", line 333, in _format_usage
>    action_usage = format(optionals + positionals, groups)
>  File "/usr/lib/python3.9/argparse.py", line 408, in _format_actions_usage
>    start = actions.index(group._group_actions[0])
> IndexError: list index out of range

Change-Id: I8cc8d73a785fb164ff7b9568076eab10bd53f77d

bin/check_sip.py

@@ -252,7 +252,6 @@ def main(args):
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="generate TAP result")
-    grp = parser.add_mutually_exclusive_group()
     parser.add_argument("test_file", help="YAML file with checks")
     parser.add_argument("msg_file", help="sipp file")
     parser.add_argument("-d", "--debug", action="store_true")