What’s the meaning of "cut it out"?

In the movie Mary Magdalene 2018, minute: 03:54, there is this sentence: "Mary! You have to tell her. She can't cut it out.". So, my question is: what’s the meaning of "She can't cut it out"? Thank you, It is about a woman about to give birth, these are the sentences from English subtitle: -Mary! You have to tell her. She can't cut it out. -There's no time for this. -You can't cut her. -She needs to push. -There's no point pushing. The baby can't get through. -You have to find a way. -I can try and stretch her, but she needs to stay completely still.