Need help prometheus is eating my disk! šŸ˜°

Iā€™m currently running the Docker version of GitLab locally on my machine for my projects
GitLab is working well and the Docker image updates are going well too
By cons the disk space taken by GitLab does not stop to grow ( several GB!!!)
I investigated on my side and it is the folder /var/opt/gitlab/prometheus/data which takes more than 80% of the disk space taken by GitLab
Is prometheus essential for GitLab?
My use of GitLab is very simple. Is in my case prometheus is essential?
If I can not disable it does there exist at least one command that would allow me to reduce the disk space used by prometheus?