Manchester United shockingly let go of their manager Ruben Amorim on Monday in a decision few saw coming. Former United striker Wayne Rooney, however, was one of them. After United’s draw with Leeds, Amorim had taken part in a press conference and made comments stating that he came to Manchester United as a manager with full authority and not merely a coach taking orders. And Rooney had predicted he might not last for 18 more months. “I came here to be the manager of Manchester United, not to be the coach of Manchester United, and that is clear. “I know that my name is ​not (Thomas) Tuchel, it’s not (Antonio) Conte, it’s not (Jose) Mourinho, ‌but I’m the manager of Manchester United. It’s going to be like this for 18 months or when the board decides ​to change,” Amorim said to reporters on Sunday. “So that was my point. I want to finish with that. I’m not going to quit. I will do my job until another guy is coming here to replace me. I …