How to Hide Flipbox - Awesomes Flip Boxes Image Overlay Admin Menus

function plt_hide_image_hover_effects_ultimate_visual_composer_menus() {
	//Hide "Flip Box".
	remove_menu_page('oxi-flip-box-ultimate');
	//Hide "Flip Box → Flip Box".
	remove_submenu_page('oxi-flip-box-ultimate', 'oxi-flip-box-ultimate');
	//Hide "Flip Box → Create New".
	remove_submenu_page('oxi-flip-box-ultimate', 'oxi-flip-box-ultimate-new');
	//Hide "Flip Box → Import Templates".
	remove_submenu_page('oxi-flip-box-ultimate', 'oxi-flip-box-ultimate-import');
	//Hide "Flip Box → Oxilab Addons".
	remove_submenu_page('oxi-flip-box-ultimate', 'oxi-flip-box-ultimate-addons');
	//Hide "Flip Box → Settings".
	remove_submenu_page('oxi-flip-box-ultimate', 'oxi-flip-box-ultimate-settings');
}

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

Where do I put this code?