Citing preexisting concerns, Swampscott parents Friday presented the School Committee with a statement of no confidence in the elementary school principal who recently came out as transgender. Shannon Daniels, previously known as Tom, also took an unexpected leave of absence this week. Superintendent Pamela Angelakis initially told parents in an e-mail that she and Daniels had mutually agreed Daniels would go on leave for “at least a few days.” On Friday, the superintendent’s assistant said she could not say when Daniels would return. School Committee chairwoman Amy O’Connor said she received the parents’ petition Friday, and she was just beginning...