Remove numpy/pandas dependencies in surround_cli

[luisfciencias]

For surround_cli, is it really necessary to have the following entries in requirements.txt:
numpy==1.17.3
pandas==0.25.2?
The simple call to pip install surround_cli gets complicated:
ERROR: Failed cleaning build dir for numpy
and also taking too long for the setup.py execution.

As in the pure surround python module, is it possible to simplify the requirements file?

[ucokzeko]

We can't remove pandas and numpy because they are used in cli.py and visualise_classifier.py