The room resource should now appear under the Rooms section of the left menu in your Outlook calendar view. Toggling the check box to the left of the room name will add or remove the calendar from your main calendar view.
To remove a room resource from your calendar view, right click on the room resource name in the left menu and click Delete Calendar.
To remove a room resource from your calendar view, right click on the room resource name in the left menu and select Remove Shared Calendar.