How to Hide Team Circle Image Slider With Lightbox Admin Menus

function plt_hide_circle_image_slider_with_lightbox_menus() {
	//Hide "Circle Slider plus Lightbox".
	remove_menu_page('circle_thumbnail_slider_with_lightbox');
	//Hide "Circle Slider plus Lightbox → Slider Settings".
	remove_submenu_page('circle_thumbnail_slider_with_lightbox', 'circle_thumbnail_slider_with_lightbox');
	//Hide "Circle Slider plus Lightbox → Manage Images".
	remove_submenu_page('circle_thumbnail_slider_with_lightbox', 'circle_thumbnail_slider_with_lightbox_image_management');
	//Hide "Circle Slider plus Lightbox → Preview Slider".
	remove_submenu_page('circle_thumbnail_slider_with_lightbox', 'circle_thumbnail_slider_with_lightbox_preview');
}

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

Where do I put this code?