To delete Dataproc on GKE virtual cluster, follow the steps to delete a Dataproc on Compute Engine cluster.
Delete node pools: Deleting a Dataproc on GKE virtual cluster deletes Dataproc component software from the GKE cluster, but it does not delete Dataproc on GKE node pools created on the GKE cluster. After deleting the Dataproc on GKE cluster, you can delete node pools that are no longer in use by a Dataproc on GKE cluster.