See below for how to delete a scan configuration from a Discovery Scanner.

To delete a scan configuration

1. Log in as an administrator with the global_admin role.
2. Go to Find > Discovery.
3. In the content pane, click the checkbox of the Discovery Scanner of the configuration you want to delete.
4. Click Configure.
5. In the top list of the Configure dialog, select the scan configuration you want to delete. 
6. Click Delete.