Logging message bug

[ana-kop]

A very minor issue, very similar incorrect logging messages in 2 functions:

1. genet/genet/schedule_elements.py

   Line 2744 in 74ef121

   logging.info(f'Removed Services with IDs `{service_id}`, and Routes: {route_ids}')

2. genet/genet/schedule_elements.py

   Line 2899 in 74ef121

   logging.info(f'Removed Routes with IDs {route_ids}, to Services `{service_id}`.')

Should use service_ids not service_id to list all services that have been removed/ from which routes have been removed

(In the second case, might make more sense for the message to say ...belonging to Services {service_ids}