How to Hide MyVideoRoom Admin Menus

function plt_hide_my_video_room_menus() {
	//Hide "MyVideoRoom".
	remove_menu_page('myvideoroom');
	//Hide "MyVideoRoom → Getting Started".
	remove_submenu_page('myvideoroom', 'myvideoroom');
	//Hide "MyVideoRoom → Room Builder".
	remove_submenu_page('myvideoroom', 'myvideoroom-room-builder');
	//Hide "MyVideoRoom → Room Templates".
	remove_submenu_page('myvideoroom', 'myvideoroom-templates');
	//Hide "MyVideoRoom → Shortcode Reference".
	remove_submenu_page('myvideoroom', 'myvideoroom-shortcode-reference');
	//Hide "MyVideoRoom → Default Settings".
	remove_submenu_page('myvideoroom', 'myvideoroom-permissions');
	//Hide "MyVideoRoom → Modules".
	remove_submenu_page('myvideoroom', 'myvideoroom-modules');
	//Hide "MyVideoRoom → Advanced".
	remove_submenu_page('myvideoroom', 'myvideoroom-custom');
}

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

Where do I put this code?