If you no longer want a host protected by Sandfly, or the host has login or other errors, you can remove it from the active list of hosts very easily. Simply click on the checkbox to the left of the entry. You can also select a group of systems and delete them all in bulk with the Select All and then Delete Selected button up top.
Selecting inactive hosts for deletion
NOTE: All Hosts Count Towards Your License, Even Invalid Ones! It is important to note that all hosts in this list are counted towards your total hosts under your license. So if you have hosts that are inactive, timed out, or you cannot access with your credentials, you should delete them so you can have full license capacity for the hosts that you want to protect.