Apparently, he's not doing it in practice or isn't showing the coaching staff enough to crack the lineup. The way I understand it is, the goalie coach Karl G makes his recommendations who's playing the best to the head coach.
Obviously, the coaching staff sees him in practice also and probably agree with his position coach. Then the coaching staff makes their travel roster. Right now, Tomek has been left home and is the third goalie on the depth chart. I guess you can read into this what you want. IMHO, this translates to me as Tomek isn't getting it done in practice and the coaching staff sees it this way. Pouting and or leaving isn't going to make him better.