DOC Duplicate information about supported Python versions (scikit-learn#31084)

Author: DimitriPapadopoulos

README.rst

@@ -72,10 +72,6 @@ scikit-learn requires:
 
 =======
 
-**Scikit-learn 0.20 was the last version to support Python 2.7 and Python 3.4.**
-scikit-learn 1.0 and later require Python 3.7 or newer.
-scikit-learn 1.1 and later require Python 3.8 or newer.
-
 Scikit-learn plotting capabilities (i.e., functions start with ``plot_`` and
 classes end with ``Display``) require Matplotlib (>= |MatplotlibMinVersion|).
 For running the examples Matplotlib >= |MatplotlibMinVersion| is required.