add_theme_support > remove_theme_support?

i often remove the import demo options for non admins. Because importing a demo removes all other content and settings.
If you like to completely obfuscate the options styling try this.
those who know where to find aren’t hampered to use it anyway. But on exidentily usage maybe this is helpful:

function admin_head_mod() {
if(!is_admin()){ 
echo '<style type="text/css">
	#avia_options_page .goto_styling, 
	#avia_options_page #avia_styling { 
		display: none !important
	}
</style>';
}
}
add_action('admin_head', 'admin_head_mod');

you can do that for quick css only – it has an own ID so :
If your developers have all admin right – you might want to have it globaly

function admin_head_mod() {
echo '<style type="text/css">
	#avia_quick_css { 
		display: none !important
	}
</style>';
}
add_action('admin_head', 'admin_head_mod');