Hi @MeineLiebeAxt ,
Since you will not be using the logs generated by ROS, you can delete the logs.
Simply go inside /home/user/.ros/log and delete all the contents inside.
The logs will get regenerated upon a new project build catkin_make in ROS or colcon build in ROS2 and logs are saved when you run ROS programs.
You can delete them. It is safe to do so and will cause no harm!
EDIT: You can do rosclean purge to remove all the logs from that folder. This is just when you want to delete all logs. If you wish to keep a few then you must manually go into the folder and delete the ones you do not want.
Regards,
Girish