MIAMI — Miami police will not allow former Haitian President Michel Martelly, known as “Sweet Micky” on stage, to perform at a music festival in Little Haiti on Saturday, citing safety concerns amid pressure from community members who say the controversial politician and singer shouldn’t be welcome in the city. Martelly, the president of Haiti from 2011 to 2016 and a popular musician, drew protesters at a 2018 show in Miami that, like the event this weekend, took place at the Little Haiti Cultural Complex in celebration of Haitian Flag Day. A Miami Police Department spokesperson said Friday mo…