The NFL world is still waiting for the first domino to fall in the coaching carousel, with all five teams in need of a head coach having yet to fill their vacancies. It sounds like at least one of those teams could be getting close to doing so. Charlotte-based reporter Will Kunkel reported Tuesday that the Panthers have completed all of their initial interviews. While the team still plans to conduct a second round of interviews before making a hire, the report means the candidate pool for the job is fixed. “The Panthers have competed all initial interviews,” Kunkel tweeted.…