Update README.md
Remove the line as the directory it refers to does not exist any more
This submodule includes:
1. A [script](generate_conda_file.py) to generate the Conda environment file for running Python scripts and notebooks in this Git repo
-1. Scripts in [repo_metrics](./repo_metrics) used to track the repo activity
-1. Python [script](remove_pixelserver.py) to remove pixelserver tracking from all example notebooks.
+2. Python [script](remove_pixelserver.py) to remove pixelserver tracking from all example notebooks.
