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)
OptionalselectiveUse this parameter if you want to remove the keyboard for specific users only. Targets: 1) users that are
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.
Upon receiving a message with this object, Telegram clients will remove the current custom keyboard and display the default letter-keyboard. By default, custom keyboards are displayed until a new keyboard is sent by a bot. An exception is made for one-time keyboards that are hidden immediately after the user presses a button (see ReplyKeyboardMarkup). Not supported in channels and for messages sent on behalf of a Telegram Business account.