remove facetime on El Capitan
Hello,
Each time I boot my iMac with recently upgraded to El Capitan, it pops up annoying Messages Agent alerts asking for permission for Facetime to get access to my keychain.
I never use Facetime and I don't want it to have access to my private information.
How can I completely remove or disable Facetime?
I have tried searching all Settings but I can't find where I turn off this Messages Agent disturbing pop ups.
Thanks
iMac, OS X El Capitan (10.11.3)