removing pypy downloads banner until it shows meaningful information

Author: ghackebeil

README.rst

@@ -13,9 +13,6 @@ PyORAM
 .. image:: https://img.shields.io/pypi/v/PyORAM.svg
     :target: https://pypi.python.org/pypi/PyORAM/
 
-.. image:: https://img.shields.io/pypi/dm/PyORAM.svg
-    :target: https://pypi.python.org/pypi/PyORAM/
-
 Python-based Oblivious RAM (PyORAM) is a collection of
 Oblivious RAM algorithms implemented in Python. This package
 serves to enable rapid prototyping and testing of new ORAM