LONDON (Reuters) – The Taliban administration has criticised Prince Harry after the British royal said in his memoir that he had killed 25 people in Afghanistan when serving as a military helicopter pilot, describing them as “chess pieces removed from the board”. Harry’s highly personal book “Spare” went on sale in Spain days before its global launch on Jan. 10. It discloses the depth of the rift between the prince and his brother William, the heir to the throne, and other revelations such as drug-taking and how he lost his virginity. In one section, the 38-year-old recounts his two tours of A…