[cleanup] Remove behavior that is in argparse already

```
    def parse_known_args(self, args=None, namespace=None):
        if args is None:
            # args default to the system args
            args = _sys.argv[1:]
        else:
            # make sure that args are mutable
            args = list(args)
```

Author: Pierre-Sassoulas

pylint/config/arguments_manager.py

@@ -225,12 +225,9 @@ def _parse_command_line_configuration(
         self, arguments: Sequence[str] | None = None
     ) -> list[str]:
         """Parse the arguments found on the command line into the namespace."""
-        arguments = sys.argv[1:] if arguments is None else arguments
-
         self.config, parsed_args = self._arg_parser.parse_known_args(
             arguments, self.config
         )
-
         return parsed_args
 
     def _generate_config(