Massachusetts will soon no longer require public school students, teachers, and staff to wear masks while indoors, joining a growing list of states that have phased out their classroom mask mandates. The current statewide mask mandate for public schools will not be extended once it expires on Feb. 28, Massachusetts Education Commissioner Jeff Riley said Wednesday. Instead, it will be left to individual school districts to decide their own mask policies. “During the past two years, the impact of COVID-19 on children has caused a strain on their mental health, emotional well-being, and academic success,” Riley said. “We are relieved to now be in a place where we can provide young people additional relief from COVID-19 restrictions so they can continue to return to normalcy in the classroom.” That being said, students and staff will still have to wear masks in “certain scenarios,” including when a student tests positive for …