Remove unused badges from README.md

Author: jeancochrane

README.md

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 # pytest-flask-sqlalchemy
 
-[![Build Status](https://travis-ci.org/jeancochrane/pytest-flask-sqlalchemy.svg?branch=master)](https://travis-ci.org/jeancochrane/pytest-flask-sqlalchemy) ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/Django.svg)
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 A [pytest](https://docs.pytest.org/en/latest/) plugin providing fixtures for running tests in
 transactions using [Flask-SQLAlchemy](http://flask-sqlalchemy.pocoo.org/latest/).