CSS to remove 0/1 lesson completion on course player

Can anyone help me remove the above?

I have tried: 

.lrn-course-player.lrn-widget-session-completion-status-open {
display: none;
}

.lrn-widget-session-completion-status-open {
display: none;
}

lrn-widget-session-completion-status-open {
display: none;

What am I missing?