Remove server from license.

I have a per website licence and I wil decommission a server.

I already deleted it from /opt/cpfence/user-config/cpfwebui/servers.txt, but if I click on sync ips, the IP still appearing in the list.

I also noticed that the IP still attached to the license in the client area.

What's the procedure for this?

It will continue to appear until the server is fully deleted. You can safely ignore the IP still showing in the list.