Remove codefactor badge for now (requires login)

README.md

@@ -3,7 +3,7 @@
 [![Download](https://api.bintray.com/packages/salesforce/maven/TransmogrifAI/images/download.svg)](https://bintray.com/salesforce/maven/TransmogrifAI/_latestVersion) [![Javadocs](https://www.javadoc.io/badge/com.salesforce.transmogrifai/transmogrifai-core_2.11.svg?color=blue)](https://www.javadoc.io/doc/com.salesforce.transmogrifai/transmogrifai-core_2.11) [![Spark version](https://img.shields.io/badge/spark-2.2-brightgreen.svg)](https://spark.apache.org/downloads.html) [![Scala version](https://img.shields.io/badge/scala-2.11-brightgreen.svg)](https://www.scala-lang.org/download/2.11.12.html) [![License](http://img.shields.io/:license-BSD--3-blue.svg)](./LICENSE) [![Chat](https://badges.gitter.im/salesforce/TransmogrifAI.svg)](https://gitter.im/salesforce/TransmogrifAI?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 
-[![TravisCI Build Status](https://travis-ci.com/salesforce/TransmogrifAI.svg?token=Ex9czVEUD7AzPTmVh6iX&branch=master)](https://travis-ci.com/salesforce/TransmogrifAI) [![CircleCI Build Status](https://circleci.com/gh/salesforce/TransmogrifAI.svg?&style=shield&circle-token=e84c1037ae36652d38b49207728181ee85337e0b)](https://circleci.com/gh/salesforce/TransmogrifAI) [![Codecov](https://codecov.io/gh/salesforce/TransmogrifAI/graph/badge.svg?token=snKCVButEm)](https://codecov.io/gh/salesforce/TransmogrifAI) [![CodeFactor](https://www.codefactor.io/repository/github/salesforce/transmogrifai/badge)](https://www.codefactor.io/repository/github/salesforce/transmogrifai)
+[![TravisCI Build Status](https://travis-ci.com/salesforce/TransmogrifAI.svg?token=Ex9czVEUD7AzPTmVh6iX&branch=master)](https://travis-ci.com/salesforce/TransmogrifAI) [![CircleCI Build Status](https://circleci.com/gh/salesforce/TransmogrifAI.svg?&style=shield&circle-token=e84c1037ae36652d38b49207728181ee85337e0b)](https://circleci.com/gh/salesforce/TransmogrifAI) [![Codecov](https://codecov.io/gh/salesforce/TransmogrifAI/graph/badge.svg?token=snKCVButEm)](https://codecov.io/gh/salesforce/TransmogrifAI)
 
 TransmogrifAI (pronounced trăns-mŏgˈrə-fī) is an AutoML library written in Scala that runs on top of Spark. It was developed with a focus on accelerating machine learning developer productivity through machine learning automation, and an API that enforces compile-time type-safety, modularity, and reuse.
 _Through automation, it achieves accuracies close to hand-tuned models with almost 100x reduction in time._