Santa Rosa police took another illegal firearm off the streets late Thursday night following a traffic stop on Senna Drive. Members of the department’s Special Enforcement Team pulled over 18-year-old Santa Rosa resident Agustin Calderon-Villanueva just before 10 p.m. During the investigation, officers discovered Calderon-Villanueva had a loaded, concealed 9-millimeter “ghost gun” in his possession. The teenager was arrested on the spot and book…