Update README

Author: thombashi

README.rst

@@ -372,14 +372,13 @@ Install from PPA (for Ubuntu)
 
 Dependencies
 ============
-Python 2.7+ or 3.5+
+Python 3.5+
 
 Mandatory Dependencies
 ----------------------------------
 - `DataProperty <https://github.com/thombashi/DataProperty>`__ (Used to extract data types)
 - `mbstrdecoder <https://github.com/thombashi/mbstrdecoder>`__
 - `pathvalidate <https://github.com/thombashi/pathvalidate>`__
-- `six <https://pypi.org/project/six/>`__
 - `sqliteschema <https://github.com/thombashi/sqliteschema>`__
 - `tabledata <https://github.com/thombashi/tabledata>`__
 - `typepy <https://github.com/thombashi/typepy>`__