delete interface at Virtual Router

[mylove142]

Hi all,
I use Checkpoint VSX NGAI v2.5 + Crossbeam X40, also use Provider-1 to manage Checkpoint VSX.
Now, I use Provider-1 to add a new customer (named CustomerA). After creating successfully, I delete CustomerA. I don't see the route at VS but I see the interfaces at Virutal Router. Now, I want to delete the interface at Virtual router but I can't delete (you can look at the attachment file)
If you know how to delete interface at Virtual Router, please help me.
Thank you very much.