from pathlib import Path
p = Path(r"C:\Users\Admin\Desktop\AAPLICAZIONI\MIMMOECONSULENTI\AAAAAPPLICAZIONI NON TOCCARE QUI\GESTIONE_CLIENTI\DUPLICAZIONE\toilettatura\DASHBOARD\centraledash\dashboard.php")
b = p.read_bytes()
if b.startswith(b"\xef\xbb\xbf"):
    p.write_bytes(b[3:])