See not-Prince Harry gallop. See not-Prince Harry swing his mallet. Hear the lords of Netflix gnashing their teeth over what they paid for all this. Such is a summary in the U.K.’s Daily Mail of the latest item that Prince Harry and Meghan, Duchess of Sussex, have delivered to Netflix as part of their £80-million deal. The five-part documentary titled “Polo” is expected to arrive in December, but the Mail said it is not what Netflix wanted in its stocking. Harry is a bit player in the series, which centers around Nacho Figueras, a highly regarded figure in the small pool of polo but a nonentit…