Prince Harry’s upcoming memoir, “Spare,” will also spare readers new details about the royal family, according to British media reports. Readers of “Spare,” which Harry penned with help from ghostwriter J.R. Moehringer, shouldn’t expect for it to shed much new light on the Duke of Sussex nor his life, and it wasn’t edited or rewritten after his grandmother, Queen Elizabeth II, died in September, Yahoo News UK reports. Touted as a “raw” piece of writing with “insight, revelation, self-examination and hard-won wisdom” from Harry, 38, the book is due just under three years after he and his wife, …