remove docs as they are no longer relevant

Author: madisvain

README.md

@@ -1,7 +1,6 @@
 [![Package Index](https://badge.fury.io/py/drf-sideloading.svg)](https://badge.fury.io/py/drf-sideloading)
 [![Build Status](https://travis-ci.org/namespace-ee/django-rest-framework-sideloading.svg?branch=master)](https://travis-ci.org/namespace-ee/django-rest-framework-sideloading)
 [![Code Coverage](https://codecov.io/gh/namespace-ee/django-rest-framework-sideloading/branch/master/graph/badge.svg)](https://codecov.io/gh/namespace-ee/django-rest-framework-sideloading)
-[![Documentation Status](https://readthedocs.org/projects/drf-sideloading/badge/?version=latest)](http://drf-sideloading.readthedocs.io/en/latest/?badge=latest)
 [![License is MIT](https://img.shields.io/github/license/mashape/apistatus.svg?maxAge=2592000)](https://github.com/namespace-ee/drf-sideloading/blob/master/LICENSE)
 [![Code style Black](https://img.shields.io/badge/code%20style-black-000000.svg?maxAge=2592000)](https://github.com/ambv/black)