NEW YORK – Mayor Bill de Blasio is confident that New York City will meet a revised timeline to bring public school students back to classrooms within the next two weeks, following closures because of the coronavirus pandemic, he said Friday.“I feel very confident about that date,” de Blasio said on MSNBC’s “Morning Joe.”De Blasio on Thursday delayed the reopening plan for the nation’s largest school district for the second time since it was announced in July, citing a shortage of staff and supplies.Unions representing the city's teachers said it wouldn’t have been safe to open all the school sites next week.Under the revised timeline, most elementary school students will return to in-person learning starting Sept.