Fix README.rst: drop old versions from readme

Author: penguinolog

README.rst

@@ -49,8 +49,6 @@ Pros:
     Python 3.11
     Python 3.12
 
-.. note:: Old pythons: For Python 2.7 and PyPy use versions 1.x.x, python 3.4 use versions 2.x.x, python 3.5 and PyPy 3.5 use versions 3.x.x
-
 This package includes:
 
 * `SSHClient` - historically the first one helper, which used for SSH connections.