Update docs index

Author: ahmedfgad

docs/source/index.rst

@@ -73,11 +73,6 @@ Install PyGAD with the following command:
 
    pip3 install pygad
 
-PyGAD is developed in Python 3.7.3 and depends on NumPy for creating and
-manipulating arrays and Matplotlib for creating figures. The exact NumPy
-version used in developing PyGAD is 1.16.4. For Matplotlib, the version
-is 3.1.0.
-
 Quick Start
 ===========