How to Hide WP VR Admin Menus

function plt_hide_wpvr_menus() {
	//Hide "WP VR".
	remove_menu_page('wpvr');
	//Hide "WP VR → Tours".
	remove_submenu_page('wpvr', 'edit.php?post_type=wpvr_item');
	//Hide "WP VR → Add New Tour".
	remove_submenu_page('wpvr', 'post-new.php?post_type=wpvr_item');
	//Hide "WP VR → Settings".
	remove_submenu_page('wpvr', 'wpvr-setting');
	//Hide "WP VR → Free vs Pro".
	remove_submenu_page('wpvr', 'wpvr');
	//Hide "WP VR → Setup Wizard".
	remove_submenu_page('wpvr', 'rex-wpvr-setup-wizard');
	//Hide "WP VR → Go Pro".
	remove_submenu_page('wpvr', 'https://rextheme.com/wpvr/wpvr-pricing');
}

add_action('admin_menu', 'plt_hide_wpvr_menus', 11);
Where do I put this code?