You’re right, the matplot lib import is no longer required. In a previous version I plotted the schedule, but have since removed that code.
Does your code still exist? Your gitlab link 404s
The code is here now https://gitlab.com/librespacefoundation/satnogs/satnogs-auto-scheduler
WARNING this is highly experimental code
Okay. (And I know very well how experimental it is. I helped write the send to server part originally.)