delete getting-started-ipynb
delete getting-started-ipynb

This is a very outdated file and not necessary since we have started pack.
RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_nlu,RasaHQ/rasa_core,RasaHQ/rasa_nlu,RasaHQ/rasa_core