BRUSSELS—Belgium will scrap COVID-19 restrictions on restaurants and cafes, allowing them to operate under their usual hours as part of the government’s reopening plan and as more than two-thirds of the population have been vaccinated. But the measures, which will take effect on Sept. 1, will not apply to Brussels, home to the European Commission, the European Parliament, and NATO, because of the low vaccination rate in some parts of the city. Prime Minister Alexander De Croo urged Belgians who have yet to get their jabs to do so as soon as possible, adding that vaccination would be mandatory for healthcare workers. “Today, more than eight out of 10 adults are fully vaccinated. We can now take this further step,” he told a news conference. While there will be no limits on the number of people sitting together at a table and no social distancing curbs, restaurant diners and cafe …