Underneath the poster is the ø symbol. Click ø and then choose, Yes, Hide It! This will hide this show from your progress and the Up next to watch on the dashboard.
Clicking on the ø on the calendar will hide the show from all calendar views.
Go to the Hidden Items section of your settings.
Any show that you click on will be restored. The top section is the shows you've hidden from your calendar. Once you've scrolled through the hidden calendar items, the hidden shows from your progress are visible. To restore a show to both calendar and progress, click on the show poster in both sections.