ANSWER: 

This is not permissible. What she can do is, bleach the excess hair from the eyebrows, providing she doesn’t show them in front of non maharams or while going out. 

Kindly refer to the following link(s):

My sister turn to Sunnah of Muhammad (sm) Alhamdulillah she is 29 yrs old. Previously she did eyebrows plucking. Currently she stopped it. But after stopping plucking, it growing fast & become longer. Her face looks too ugly as she scared her husband ignore her for this ugly face. My question is can she use scissors or something else to cut off her hair from eyebrow side?