function plt_hide_wptelegram_widget_menus() {
//Hide the "WP Telegram" menu.
remove_menu_page('wptelegram');
//Hide the "WP Telegram → Telegram Widget" menu.
remove_submenu_page('wptelegram', 'wptelegram_widget');
}
add_action('admin_menu', 'plt_hide_wptelegram_widget_menus', 21);