How to Hide video carousel slider with lightbox Admin Menus

function plt_hide_wp_responsive_video_gallery_with_lightbox_menus() {
	//Hide "Video Carousel with Lightbox".
	remove_menu_page('responsive_video_gallery_with_lightbox');
	//Hide "Video Carousel with Lightbox → Carousel Settings".
	remove_submenu_page('responsive_video_gallery_with_lightbox', 'responsive_video_gallery_with_lightbox');
	//Hide "Video Carousel with Lightbox → Manage Videos".
	remove_submenu_page('responsive_video_gallery_with_lightbox', 'responsive_video_gallery_with_lightbox_video_management');
	//Hide "Video Carousel with Lightbox → Preview Gallery".
	remove_submenu_page('responsive_video_gallery_with_lightbox', 'responsive_video_gallery_with_lightbox_video_preview');
}

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