### Description

There're `1xx_replies` metric in `sl` module. But the metric doesn't work.

### Troubleshooting

There're no handle in `void update_sl_stats(int code)`. https://github.com/kamailio/kamailio/blob/f37940b9a113ab79611f851334af7f8fbb...

### Proposal

Remove `1xx_replies` from `sl` module. Or add the handling.