disabling the desktop interface?

hello folks

I noticed that my 'headless ’ music player, on installation, actually did bring up a chromium/X11 interface.
I suspect I would get a faster boot from a user wielding a smartphone perspective if I could disable this
Xserver startup.
anyone know the right magic incantation?!

thanks

got it:
systemctl disable volumio-kiosk

with no effect on the http server…