How to Hide Tabs – Responsive Tabs with WooCommerce Product Tab Extension Admin Menus

function plt_hide_vc_tabs_menus() {
	//Hide "Content Tabs".
	remove_menu_page('oxi-tabs-ultimate');
	//Hide "Content Tabs → Shortcode".
	remove_submenu_page('oxi-tabs-ultimate', 'oxi-tabs-ultimate');
	//Hide "Content Tabs → Create New".
	remove_submenu_page('oxi-tabs-ultimate', 'oxi-tabs-ultimate-new');
	//Hide "Content Tabs → Settings".
	remove_submenu_page('oxi-tabs-ultimate', 'oxi-tabs-ultimate-settings');
	//Hide "Content Tabs → Oxilab Plugins".
	remove_submenu_page('oxi-tabs-ultimate', 'oxi-tabs-ultimate-plugins');
	//Hide "Content Tabs → Support".
	remove_submenu_page('oxi-tabs-ultimate', 'oxi-tabs-ultimate-welcome');
}

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

Where do I put this code?