Delete Old VoIP handset?

[healthy]

Hi,
I have had a run of handsets (Grandstream, Yealink and Snom) that I have been trying. Have settled in on the Yealink T46G and every time I start 3CXPhone, it has to ask me which phone to work with. Is there a way to delete out phones from my extension? I don't see an obvious way.
Thanks so much!

 

[roland_3CX]

Hi Healthly,

The IP Phones that you will not longer be using, you may perform a factory reset.