Belgium did not take part in the triathlon mixed relay in Paris on Monday, the Belgian Olympic Committee said after one of the country’s athletes became sick and withdrew from the competition. The withdrawal of the athlete Claire Michel prompted renewed debate about the water quality of the Seine despite coming several days after she swam in the river. Pierre Rabadan, deputy mayor of Paris in charge of sport, the Olympic and Paralympic Games and the Seine, told FranceInfo on Monday morning that other athletes were sick in the Olympic village who did not swim in the river. “Nothing allows us to…