Edit README.md -- remove FL package install (GPU too conflict with auto installing)

README.md

@@ -39,7 +39,7 @@ This framework requires:
   ```bash
   pip install -r requirements.txt
   ```
-*Note:* `requirements.txt` includes `TensorFlow`, `scikit-learn` and `numpy` for running the provided Flower example. These packages requirement will be removed in official version.
+*Note:* You also need to install `tensorflow`, `tensorflow-datasets` `scikit-learn` and `numpy` if you want to run the provided Flower example.
 
 Navigate to `Run` directory: