Sydney has largely banned crowds for its world-renowned pyrotechnic display, while Melbourne’s fireworks are cancelled. New South Wales restrictions were tightened further on Wednesday as the state battles to control its growing outbreak. Residents in Greater Sydney, including Wollongong, Central Coast and Blue Mountains, will be restricted to hosting five visitors in their homes, including children. The limit for outdoor gatherings will be reduced from 50 to 30. Restrictions for the northern zone of the Northern Beaches remain the same, while those in the area’s southern zone will be allowed five visitors, including children, from within the zone. And while boats will be allowed on Sydney Harbour, they will have to abide by strict guidelines. Rain is forecast and this will be good news for authorities, who are urging the public to watch the shortened midnight fireworks display on TV. The 9 p.m. kids-friendly fireworks will not go ahead and …