How to Hide CyberPress Admin Menus

function plt_hide_cyberpress_menus() {
	//Hide "CyberPress".
	remove_menu_page('cyberpress');
	//Hide "CyberPress → Matches".
	remove_submenu_page('cyberpress', 'edit.php?post_type=match');
	//Hide "CyberPress → Tournaments".
	remove_submenu_page('cyberpress', 'edit.php?post_type=tournament');
	//Hide "CyberPress → Players".
	remove_submenu_page('cyberpress', 'edit.php?post_type=player');
	//Hide "CyberPress → Teams".
	remove_submenu_page('cyberpress', 'edit.php?post_type=team');
	//Hide "CyberPress → Games".
	remove_submenu_page('cyberpress', 'edit.php?post_type=game');
	//Hide "CyberPress → Settings".
	remove_submenu_page('cyberpress', 'cyberpress-settings');
}

add_action('admin_menu', 'plt_hide_cyberpress_menus', 11);

Where do I put this code?