removing orphans notebooks (#3536)

* removing debug and monitor sample

* removed yolov5 notebooks

* removing iris sample

* removing accident-prediction.ipynb

* removing sklearn-diabetes.ipynb

* removing iris-scikit-learn.ipynb sample

* removing mnist-sklearn-mnist sample

* removing tensorflow-mnist.ipynb sample

* removing question answering sample of foundation models

* removing token classification sample

* removing transalation online endpoint sample

* removing zero shot classification sample

Author: jayesh-tanna