remove extra shield

Author: Alexey Smirnov

README.md

@@ -1,6 +1,5 @@
 [![Build Status](https://travis-ci.org/smirnov-am/pyfinmod.svg?branch=master)](https://travis-ci.org/smirnov-am/pyfinmod)
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-[![pypi](https://img.shields.io/pypi/v/pyfinmod.svg)](https://img.shields.io/pypi/v/pyfinmod)
 [![Documentation Status](https://readthedocs.org/projects/pyfinmod/badge/?version=latest)](https://pyfinmod.readthedocs.io/en/latest/?badge=latest)
 ## Financial modelling with Python and Pandas