DAKAR, Senegal—LamineDiack, the controversial long-time leader of track and field who was convicted of extorting money from athletes and accused of taking bribes in an Olympic hosting vote, has died, his family said Friday. He was 88. Awa Diack, niece of the former International Olympic Committee member, told The Associated Press that “my uncle LamineDiack passed away Thursday to Friday night.“ Diack led track and field’s governing body—then known as the IAAF, now World Athletics—for 16 years. But his name has become a byword for corruption in Olympic circles since 2015, as allegations of wron…