I have deployed kafka-lag-exporter helm chart from here in my existing kubernetes cluster.
For my own experimentation, I have removed helm release from cluster resulting in removal of all deployed Kubernetes kind's belongs to that release.
However, Prometheus is still showing kafka-lag-exporter's metrics in prometheus. Surprisingly, it is also showing values too .
I didn't understand why these metrics are shown in prometheus despite of removing kafka-lag-exporter from cluster!

Note- Prometheus is deployed as prometheus operator.