How to Hide Livemesh SiteOrigin Widgets Admin Menus

function plt_hide_livemesh_siteorigin_widgets_menus() {
	//Hide "Livemesh Widgets".
	remove_menu_page('livemesh_so_widgets');
	//Hide "Livemesh Widgets → Settings".
	remove_submenu_page('livemesh_so_widgets', 'livemesh_so_widgets');
	//Hide "Livemesh Widgets → Documentation".
	remove_submenu_page('livemesh_so_widgets', 'livemesh_so_widgets_documentation');
	//Hide "Livemesh Widgets → Contact Us".
	remove_submenu_page('livemesh_so_widgets', 'livemesh_so_widgets-contact');
	//Hide "Livemesh Widgets → Upgrade".
	remove_submenu_page('livemesh_so_widgets', 'livemesh_so_widgets-pricing');
}

add_action('admin_menu', 'plt_hide_livemesh_siteorigin_widgets_menus', 1000000000);
Where do I put this code?