How do you Remove the OFFLINE AGENTS

I have 12 assets not in my console but are in the agent list in the platform. They show offline, and we are getting notifications via email about offline agents (didnt know that was a thing) anway there are 12 offline but they are shut down how do i make them go away from the platform from the offline sections in agent list???

Agents for IVM vulnerability collection can be configured to drop off using the IVM-specific data retention policy on the local security console. This action will remove the asset page and reduce the IVM license count. Learn more.

When the assets come back online, the Agent Software, if still installed, will begin beaconing into Rapid7 endpoints and reappear in IVM. This is contingent on the Agent Software being set to start automatically and its jobs not failing for any reason.

IVM offers additional options to manage the asset page and reduce the license count, such as filtering assets into an Asset Group and deleting them from the console.

https://docs.rapid7.com/insightvm/database-backuprestore-and-data-retention/#agent-data