After an injury to Callum McGregor ruled him out of the Celtic trip to Hearts last week, two further players have dropped out of contention for the visit of Livingston on Sunday. Celtic lost their appeal of Hyunjun Yang’s red card at Tynecastle meaning he will miss tomorrow afternoon’s Scottish Cup clash and the upcoming fixture against St Johnstone. Brendan Rodgers also confirmed in a media conference on Friday that Luis Palma is a doubt for the visit of David Martindale’s team after picking up a knock. Meanwhile, McGregor and Reo Hatate remain sidelined until after the upcoming international…