Actually we doesn't require the titlebar. But no settings in weston.ini help us to remove the titlebar in client side.
Right, we do not support a way to do this; clients need to know themselves that they should not draw title bars. You would have to address this in whatever client you are using; each toolkit often has their way to avoid drawing decorations.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.