By Felix Keith Manchester United supporters are set to protest against the club’s decision to move Old Trafford season ticket holders on Sunday. United have a chance to book a place in the semi-finals of the FA Cup when they take on Liverpool in a 3.30pm kick-off. But while there will be nearly 70,000 fans cheering on the home side, some will also be holding a silent protest against their club. Fans have reacted with fury to plans to relocate some season ticket holders in order to give United academy players better seats in the Sir Bobby Charlton Stand. Protest group South Stand United are enc…