Celtic have endured a struggle over the years in retaining academy talent, and they haven’t brought through as many prodigies from Lennoxtown to the first team as some would’ve liked. During the summer window, Rocco Vata and Daniel Kelly became the latest examples amid their departures to Watford and Millwall despite both being presented with contract offers to stay put. In the case of Kelly, Brendan Rodgers refused to involve the youngster in pre-season after it became apparent that he wasn’t going to sign an extension to his deal, which was set to run out in December. Adopting a hardline sta…