Requests clients to remove the custom keyboard (user will not be able to summon this keyboard; if you want to hide the keyboard from sight but keep it accessible, use one_time_keyboard in ReplyKeyboardMarkup).

Use this parameter if you want to remove the keyboard for specific users only. Targets: 1) users that are @mentioned in the text of the Message object; 2) if the bot's message is a reply (has reply_to_message_id), sender of the original message. Example: A user votes in a poll, bot returns confirmation message in reply to the vote and removes the keyboard for that user, while still showing the keyboard with poll options to users who haven't voted yet.