Replaced WLED, how do I remove the old from the configs?

I have set up Aircookies wled, and it’s working very well, with a quindor Diguno.
I had a simple esp8266 connected directly previously, but wanted to have the security with the fuse and everything.
So now I have added a new WLED, and removed the old one from the WLED app. but how do I remove the old one from the HA config?