Tips on Customizing Telegram Bot & Channel

How to Hide Telegram Bot & Channel Admin Menus

function plt_hide_telegram_bot_menus() {
	//Hide "Telegram".
	remove_menu_page('telegram_main');
	//Hide "Telegram → Telegram".
	remove_submenu_page('telegram_main', 'telegram_main');
	//Hide "Telegram → Users".
	remove_submenu_page('telegram_main', 'edit.php?post_type=telegram_subscribers');
	//Hide "Telegram → Groups".
	remove_submenu_page('telegram_main', 'edit.php?post_type=telegram_groups');
	//Hide "Telegram → Send a message".
	remove_submenu_page('telegram_main', 'telegram_send');
	//Hide "Telegram → Responders".
	remove_submenu_page('telegram_main', 'edit.php?post_type=telegram_commands');
	//Hide "Telegram → Settings".
	remove_submenu_page('telegram_main', 'telegram_settings');
	//Hide "Telegram → Log".
	remove_submenu_page('telegram_main', 'telegram_log');
}

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

Where do I put this code?

How to Hide the "Keyboard" Meta Box

function plt_hide_telegram_bot_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Keyboard" meta box.
	remove_meta_box('telegram_command_extra', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_telegram_bot_metaboxes', 20);