Remove Banshee (#2535)

Project no longer exists, link goes to 404

README.md

@@ -1978,7 +1978,6 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * [aptly](https://github.com/smira/aptly) - aptly is a Debian repository management tool.
 * [aurora](https://github.com/xuri/aurora) - Cross-platform web-based Beanstalkd queue server console.
 * [awsenv](https://github.com/soniah/awsenv) - Small binary that loads Amazon (AWS) environment variables for a profile.
-* [Banshee](https://github.com/eleme/banshee) - Anomalies detection system for periodic metrics.
 * [Blast](https://github.com/dave/blast) - A simple tool for API load testing and batch jobs.
 * [bombardier](https://github.com/codesenberg/bombardier) - Fast cross-platform HTTP benchmarking tool.
 * [bosun](https://github.com/bosun-monitor/bosun) - Time Series Alerting Framework.