docs: remove swarmprom reference

Closes stefanprodan#254.

Author: nightah

README.md

@@ -3,8 +3,6 @@
 A monitoring solution for Docker hosts and containers with [Prometheus](https://prometheus.io/), [Grafana](http://grafana.org/), [cAdvisor](https://github.com/google/cadvisor),
 [NodeExporter](https://github.com/prometheus/node_exporter) and alerting with [AlertManager](https://github.com/prometheus/alertmanager).
 
-***If you're looking for the Docker Swarm version please go to [stefanprodan/swarmprom](https://github.com/stefanprodan/swarmprom)***
-
 ## Install
 
 Clone this repository on your Docker host, cd into dockprom directory and run compose up: