remove coverage badge for now

Author: dantownsend

README.md

@@ -1,7 +1,6 @@
 # Piccolo
 
 [![Build Status](https://travis-ci.com/piccolo-orm/piccolo.svg?branch=master)](https://travis-ci.com/piccolo-orm/piccolo)
-[![Coverage Status](https://coveralls.io/repos/github/piccolo-orm/piccolo/badge.svg)](https://coveralls.io/github/piccolo-orm/piccolo)
 [![Documentation Status](https://readthedocs.org/projects/piccolo-orm/badge/?version=latest)](https://piccolo-orm.readthedocs.io/en/latest/?badge=latest)
 [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/piccolo-orm/piccolo.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/piccolo-orm/piccolo/context:python)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/piccolo-orm/piccolo.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/piccolo-orm/piccolo/alerts/)