By Jude Summerfield Transfer windows aren’t quiet at Chelsea these days. Seemingly millions of players are snapped up by the Blues each summer, with midfield one area that is particularly stacked. However, one homegrown star is being forced out and could leave a rather large hole in the middle of the park. Conor Gallagher, like Mason Mount before him, is set to depart Stamford Bridge, with Atletico Madrid stumping up significant cash after the England international rejected a couple of fresh contract offers. Gallagher was an important part of Chelsea’s starting XI under Mauricio Pochettino and…