add notebook formatting instruction in README

Author: burgerkingeater

README.md

@@ -177,7 +177,6 @@ $ bazel run //tools/lint:lint -- black pyupgrade --  tensorflow_io/core/python/o
 ```
 
 ### Notebooks/Tutorials 
-If you are updating or creating a notebook, you might want to perform notebook auto-formatting by using:
 If you are updating or creating a notebook, please refer to the tutorials and instructions mentioned [here](https://github.com/tensorflow/io/tree/master/docs/tutorials).
 
 ### Python